nonconforming anti-slice ball

ABSTRACT

A non-conforming golf ball has a plurality of dimples formed on the outer surface of the ball in a predetermined dimple pattern, the outer surface comprising one or more first areas which include a plurality of first dimples which together have a first dimple volume and at least one second area having a dimple volume less that the first dimple volume, the first and second areas being configured to establish a preferred spin axis. The second area may be a band around the equator which has a lower dimple volume or no dimples, with the polar regions have a higher volume of dimples, creating a preferred spin axis through the poles.

RELATED APPLICATIONS INFORMATION

This application claims the benefit under §119(e) of U.S. ProvisionalApplication Ser. No. 61/328,927 filed Apr. 28, 2010 and entitled“Nonconforming Anti-Slice Ball,” which is incorporated herein byreference in its entirety as if set forth in full.

BACKGROUND

1. Field of the Invention

The embodiments described herein relate generally to golf balls and arespecifically concerned with golf ball dimple patterns to create desiredflight characteristics.

2. Related Art

Golf ball dimple pattern design has long been considered a criticalfactor in ball flight distance. A golf ball's velocity, launch angle,and spin rate is determined by the impact between the golf club and thegolf ball, but the ball's trajectory after impact is controlled bygravity and aerodynamics of the ball. Dimples on a golf ball affect bothdrag and lift, which in turn determine how far the ball flies.

The aerodynamic forces acting on a golf ball during flight may bedetermined according to well-understood laws of physics. Scientists havecreated mathematical models so as to understand these laws and predictthe flight of a golf ball. Using these models along with several readilydetermined values such as the golf ball's weight, diameter and lift anddrag coefficients, scientists have been able to resolve theseaerodynamic forces into the orthogonal components of lift and drag. Thelift coefficient relates to the aerodynamic force component actingperpendicular to the path of the golf ball during flight while the dragcoefficient relates to the aerodynamic force component acting parallelto the flight path. The lift and drag coefficients vary by golf balldesign and are generally a function of the speed and spin rate of thegolf ball and for the most part do not depend on the orientation of thegolf ball on the tee for a spherically symmetrical or “conforming” golfball.

The maximum height a golf ball achieves during flight is directlyrelated to the lift generated by the ball, while the direction that thegolf ball takes, specifically how straight a golf ball flies, is relatedto several factors, some of which include spin and spin axis orientationof the golf ball in relation to the golf ball's direction of flight.Further, the spin and spin axis are important in specifying thedirection and magnitude of the lift force vector. The lift force vectoris a major factor in controlling the golf ball flight path in the x, yand z directions. Additionally, the total lift force a golf ballgenerates during flight depends on several factors, including spin rate,velocity of the ball relative to the surrounding air and the surfacecharacteristics of the golf ball. However, with respect to surfacecharacteristics, not all the regions on the surface of a spinning golfball contribute equally to the generation of the total lift force. As anexample, if the surface of the ball has a spherically symmetrical dimplepattern and the ball is hit so that the spin axis passes through thepoles, the surface region closest to the golf ball equator (i.e., thegreat circle orthogonal to the spin axis) is more important ingenerating lift than are the regions close to the poles. However, a golfball that is not hit squarely off the tee will tend to drift off-lineand disperse away from its intended trajectory. This is often the casewith recreational golfers who impart a slice or a hook spin on the golfball when striking the ball.

In order to overcome the drawbacks of a hook or a slice, some golf ballmanufacturers have modified the construction of a golf ball in ways thattend to lower the spin rate. Some of these modifications includeutilizing hard two-piece covers and using higher moment of inertia golfballs. Other manufacturers have resorted to modifying the ball surfaceto decrease the lift characteristics on the ball. These modificationsinclude varying the dimple patterns in order to affect the lift and dragon the golf ball.

Some prior golf balls have been designed with non-conforming ornon-symmetrical dimple patterns in an effort to offset the effect ofimperfect hits, so that the unskilled golfer can hit a ball moreconsistently in a straighter path. Although such balls are not legal inprofessional golf, they are very helpful for the recreational golfer inmaking the game more fun. One such ball is described in U.S. Pat. No.3,819,190 of Nepela et al. This ball is also known as a Polara™ golfball, and has regions with different numbers of dimples or no dimples. Acircumferential band extending around the spherical ball has a pluralityof dimples, while polar areas on opposite sides of the band have few orno dimples. For this asymmetric golf ball, the measured lift and dragcoefficients are strongly influenced by the orientation of the golf ballon the tee before it is struck. This is evidenced by the fact that thetrajectory of the golf ball is strongly influenced by how the golf ballis oriented on the tee. For this ball to work properly, it must beplaced on the tee with the poles of the ball oriented such that they arein the plane that is pointed in the intended direction of flight. Inthis orientation, the ball produces the lowest lift force and thus isless susceptible to hooking and slicing.

Other golf balls have been constructed of a single or multi-layer core,either solid or wound, that is tightly surrounded by a single ormultilayer cover formed from polymeric materials, such as polyurethane,balata rubber, ionomers or a combination. Although some of these golfballs do reduce some hook and slice dispersion, this type of ballconstruction has the disadvantage of adding cost to the golf ballmanufacturing process.

SUMMARY

Certain embodiments as disclosed herein provide for a golf ball having adimple pattern which results in reduced hook and slice dispersion.

In one aspect, a golf ball is designed with a dimple pattern which hasreduced or no dimple volume in a selected circumferential band aroundthe ball and more dimple volume in other regions of the ball. Thiscauses the ball to have a “preferred” spin axis because of the weightdifferences caused by locating different volume dimples in differentareas across the ball. This in turn reduces the tendency for dispersionof the ball to the left or right (hooking and slicing) during flight. Inone example, the circumferential band of lower dimple volume is aroundthe equator with more dimple volume in the polar regions. This creates apreferred spin axis passing through the poles. In one embodiment, thedimple pattern is also designed to exhibit relatively low lift when theball spins in the selected orientation around its preferred spin axis.This golf ball is nonconforming or non-symmetrical under United StatesGolf Association (USDA) rules.

A golf ball's preferred or selected spin axis may also be established byplacing high and low density materials in specific locations within thecore or intermediate layers of the golf ball, but has the disadvantageof adding cost and complexity to the golf ball manufacturing process.

Where a circumferential band of lower or zero dimple volume is providedabout the equator and more dimple volume is provided in the polarregions, a ball is created which has a large enough moment of inertia(MOI) difference between the poles horizontal (PH) orientation and otherorientations that the ball has a preferential spin axis going throughthe poles of the ball. The preferred spin axis extends through thelowest weight regions of the ball. If these are the polar regions, thepreferred axis extends through the poles. If the ball is oriented on thetee so that the “preferred axis” or axis through the poles is pointingup and down (pole over pole or POP orientation), it is less effective incorrecting hooks and slices compared to being oriented in the PHorientation when struck.

In another aspect, the ball may have no dimples in a band about theequator (a land area) and deep dimples in the polar regions. Thedimpleless region may be narrow, like a wide seam, or may be wider, i.e.equivalent to removing two or more rows of dimples next to the equator.

By creating a golf ball with a dimple pattern that has less dimplevolume in a band around the equator and by removing more dimple volumefrom the polar regions adjacent to the low-dimple-volume band, a ballcan be created with a large enough moment of inertia (MOI) differencebetween the poles-horizontal (PH) and other orientations that the ballhas a “preferred” spin axis going through the poles of the ball and thispreferred spin axis tends to reduce or prevent hooking or slicing when agolfer hits the ball in a manner which would generate other than purebackspin on a normal symmetrically designed golf ball. In other words,when this ball is hit in manner which would normally cause hooking orslicing in a symmetrical or conforming ball, the ball tends to rotateabout the selected spin axis and thus not hook or slice as much as asymmetrical ball with no selected or “preferred” spin axis. In oneembodiment, the dimple pattern is designed so that it generatesrelatively low lift when rotating in the PH orientation. The resultinggolf ball displays enhanced hook and slice correcting characteristics.

The low volume dimples do not have to be located in a continuous bandaround the ball's equator. The low volume dimples could be interspersedwith higher volume dimples, the band could be wider in some parts thanothers, the area in which the low volume dimples are located could havemore land area (lack of dimples) than in other areas of the ball. Thehigh volume dimples located in the polar regions could also beinter-dispersed with lower volume dimples; and the polar regions couldbe wider in some spots than others. The main idea is to create a highermoment of inertia for the ball when it is rotating in one configurationand to do this by manipulating the volume of the dimples across thesurface of the ball. This difference in MOI then causes the ball to havea preferred spin axis. The golf ball is then placed on the tee so thatthe preferred spin axis is oriented approximately horizontally so thatwhen the ball is hit with a hook or slice action, the ball tends torotate about the horizontal spin axis and thus not hook or slice as muchas a symmetrical ball with no preferred spin axis would hook or slice.In some embodiments, the preferred spin axis is the PH orientation,

Another way to create the preferred spin axis would be to place two ormore regions of lower volume or zero volume regions on the ball'ssurface and make the regions somewhat co-planar so that they create apreferred spin axis. For example, if two areas of lower volume dimpleswere placed opposite each other on the ball, then a dumbbell-type weightdistribution would exist. In this case, the ball has a preferred spinaxis equal to the orientation of the ball when it is rotatingend-over-end with the “dumbbell areas”.

The ball can also be oriented on the tee with the preferred spin axistilted up to about 45 degrees to the right and then the ball stillresists slicing, but does not resist hooking. If the ball is tilted 45degrees to the left it reduces or prevents hook dispersion, but notslice dispersion. This may be helpful for untrained golfers who tend tohook or slice a ball. When the ball is oriented so that the preferredaxis is pointing up and down on the tee (POP orientation for a preferredspin axis in the PH orientation), the ball is much less effective incorrecting hooks and slices compared to being oriented in the PHorientation.

Other features and advantages will become more readily apparent to thoseof ordinary skill in the art after reviewing the following detaileddescription and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The details of the present embodiments, both as to structure andoperation, may be gleaned in part by study of the accompanying drawings,in which like reference numerals refer to like parts, and in which:

FIG. 1 is a perspective view of one hemisphere of a first embodiment ofa golf ball cut in half through the equator, illustrating a first dimplepattern designed to create a preferred spin axis, the oppositehemisphere having an identical dimple pattern;

FIG. 2 is a perspective view similar to FIG. 1 illustrating a secondembodiment of a golf ball with a second, different dimple pattern;

FIG. 3 is a perspective view illustrating one hemisphere of acompression molding cavity for making a third embodiment of a golf ballwith a third dimple pattern;

FIG. 4 is a perspective view similar to FIGS. 1 and 2 illustrating afourth embodiment of a golf ball with a fourth dimple pattern;

FIG. 5 is a perspective view similar to FIGS. 1, 2 and 4 illustrating afifth embodiment of a golf ball with a fifth dimple pattern;

FIG. 6 is a perspective view similar to FIGS. 1, 2, 4 and 5 illustratinga sixth embodiment of a golf ball having a different dimple pattern;

FIG. 7 is a perspective view similar to FIGS. 1, 2, and 4 to 6illustrating a seventh embodiment of a golf ball having a differentdimple pattern;

FIG. 8 is perspective view similar to FIG. 1 but illustrating a modifieddimple pattern with some rows of dimples around the equator removed;

FIG. 9 is a diagram illustrating the relationship between the chorddepth of a truncated and a spherical dimple in the embodiments of FIGS.1 to 7;

FIG. 10 is a graph illustrating the average carry and total dispersionversus the moment of inertia (MOI) difference between the minimum andmaximum orientations for balls having each of the dimple patterns ofFIGS. 1 to 7, and a modified version of the pattern of FIG. 1, comparedwith a ball having the dimple pattern of the known non-conformingPolara™ ball and the known TopFlite XL straight ball;

FIG. 11 is a graph illustrating the average carry and total distanceversus MOI difference between the minimum and maximum orientations forthe same balls as in FIG. 10;

FIG. 12 is a graph illustrating the top view of the flights of the golfballs of FIGS. 1, 2 and 3 and several known balls in a robot slice shottest, illustrating the dispersion of each ball with distance downrange;

FIG. 13 is a side view of the flight paths of FIG. 12, illustrating themaximum height of each ball;

FIGS. 14 to 17 illustrate the lift and drag coefficients versus Reynoldsnumber for the same balls which are the subject of the graphs in FIGS.12 and 13, at spin rates of 3,500 and 4,500, respectively, for differentball orientations; and

FIG. 18 is a diagram illustrating a golf ball configured in accordancewith another embodiment.

DETAILED DESCRIPTION

After reading this description it will become apparent to one skilled inthe art how to implement the embodiments in various alternativeimplementations and alternative applications. Further, although variousembodiments will be described herein, it is understood that theseembodiments are presented by way of example only, and not limitation. Assuch, this detailed description of various alternative embodimentsshould not be construed to limit the scope or breadth of the appendedclaims.

FIGS. 1 to 8 illustrate several embodiments of non-conforming ornon-symmetrical balls having different dimple patterns, as described inmore detail below. In each case, one hemisphere of the ball (or of amold cavity for making the ball in FIG. 3) cut in half through theequator is illustrated, with the other hemisphere having an identicaldimple pattern to the illustrated hemisphere. In each embodiment, thedimples are of greater total volume in a first area or areas, and ofless volume in a second area. In the illustrated embodiment, the firstareas, which are of greater dimple volume, are in the polar regions ofthe ball while the second area is a band around the equator, designed toproduce a preferred spin axis through the poles of the ball, due to thelarger weight around the equatorial band, which has a lower dimplevolume, i.e. lower volume of material removed from the ball surface.Other embodiments may have the reduced volume dimple regions located indifferent regions of the ball, as long as the dimple pattern is designedto impart a preferred spin axis to the ball, such that hook and slicedispersion is reduced when a ball is struck with the spin axis in ahorizontal orientation (PH when the spin axis extends through thepoles).

In the embodiments of FIGS. 1-8, the preferred spin axis goes throughthe poles of the ball. It will be understood that the design of FIGS.1-8 can be said to then have a gyroscopic center plane orthogonal to thepreferred spin axis, i.e., that goes through and is parallel with theequatorial band. Thus, the designs of FIGS. 1-8 can be said to have aregion of lower volume dimples around the gyroscopic center plane. Itshould also be recognized that in these embodiments, the gyroscopiccenter plane does not go through all regions, i.e., it does not gothrough the regions with greater dimple volume.

It should also be understood that the terms equator or equatorial regionand poles can be defined with respect to the gyroscopic center plane. Inother words, the equator is in the gyroscopic center plane and thepreferred spin axis goes through the poles.

In fact it has been determined that making dimples more shallow withinthe region inside the approximately 45 degree point 1803 on thecircumference of the ball 10 with respect to the gyroscopic center plane1801, as illustrated in FIG. 18, further increases the MOI differencebetween the ball rotating in the PH and pole-over-pole (POP)orientations as described below. Conversely, making dimples deeperinside of the approximately 45 degree point 1803 decreases the MOIdifference between the ball rotating in the PH and pole-over-pole (POP)orientations. For reference, the preferred spin axis 1802 is alsoillustrated in FIG. 18.

FIG. 1 illustrates one hemisphere of a first embodiment of anon-conforming or non-symmetrical golf ball 10 having a first dimplepattern, hereinafter referred to as dimple pattern design 28-1, or “28-1ball”. The dimple pattern is designed to create a difference in momentof inertia (MOI) between poles horizontal (PH) and other orientations.The dimple pattern of the 28-1 ball has three rows of shallow truncateddimples 12 around the ball's equator, in each hemisphere, so the ballhas a total of six rows of shallow truncated dimples. The polar regionhas a first set of generally larger, deep spherical dimples 14 and asecond set of generally smaller, deep spherical dimples 15, which aredispersed between the larger spherical dimples 14. There are no smallerdimples 15 in the two rows of the larger spherical dimples closest tothe band of shallow truncated dimples 12. This arrangement removes moreweight from the polar areas of the ball and thus further increases theMOI difference between the ball rotating in the PH and pole-over-pole(POP) orientations.

Shown in Table 1 below are the dimple radius, depth and dimple locationinformation for making a hemispherical injection molding cavity toproduce the dimple pattern 28-1 on one hemisphere of the ball, with theother injection molding cavity being identical. As illustrated in Table1, the ball has a total of 410 dimples (205 in each hemisphere of theball). The truncated dimples 12 are each of the same radius andtruncated chord depth, while the larger and smaller spherical dimplesare each of three different sizes (Smaller dimples 1, 2 and 3 and largerdimples 5, 6, 7 in Table 1). Table 1 illustrates the locations of thetruncated dimples and each of the different size spherical dimples onone hemisphere of the ball.

TABLE 1 Dimple Pattern Design# = 28-1 Molding cavity internal diameter =1.692″ Total number of dimples on ball = 410 Dimple # 1 Dimple # 2Dimple # 3 Dimple # 4 Type spherical Type spherical Type spherical Typetruncated Radius 0.0300 Radius 0.0350 Radius 0.0400 Radius 0.0670 SCD0.0080 SCD 0.0080 SCD 0.0080 SCD 0.0121 TCD — TCD — TCD — TCD 0.0039 #Phi Theta # Phi Theta # Phi Theta # Phi Theta 1 0 31.89226 1 0 15.8163 10 0 1 0 62.0690668 2 90 31.89226 2 17.723349 24.95272 2 45 11.141573 2 084.1 3 180 31.89226 3 25.269266 35.26266 3 45 22.380098 3 5.6573.3833254 4 270 31.89226 4 64.730734 35.26266 4 45 33.669653 4 11.2684.1 5 72.276651 24.95272 5 135 11.141573 5 13.34 62.0690668 6 9015.8163 6 135 22.380098 6 16.83 73.3833254 7 107.72335 24.95272 7 13533.669653 7 22.66 84.1 8 115.26927 35.26266 8 225 11.141573 8 26.3262.8658456 9 154.73073 35.26266 9 225 22.380098 9 27.98 73.3833254 10162.27665 24.95272 10 225 33.669653 10 33.82 84.1 11 180 15.8163 11 31511.141573 11 38.44 61.760315 12 197.72335 24.95272 12 315 22.380098 1239.02 73.3833254 13 205.26927 35.26266 13 315 33.669653 13 45 84.1 14244.73073 35.26266 14 50.98 73.3833254 15 252.27665 24.95272 15 51.5661.760315 16 270 15.8163 16 56.18 84.1 17 287.72335 24.95272 17 62.0273.3833254 18 295.26927 35.26266 18 63.68 62.8658456 19 334.7307335.26266 19 67.34 84.1 20 342.27665 24.95272 20 73.17 73.3833254 2176.66 62.0690668 22 78.74 84.1 23 84.35 73.3833254 24 90 62.0690668 2590 84.1 26 95.65 73.3833254 27 101.26 84.1 28 103.34 62.0690668 29106.83 73.3833254 30 112.66 84.1 31 116.32 62.8658456 32 117.9873.3833254 33 123.82 84.1 34 128.44 61.760315 35 129.02 73.3833254 36135 84.1 37 140.98 73.3833254 38 141.56 61.760315 39 146.18 84.1 40152.02 73.3833254 41 153.68 62.8658456 42 157.34 84.1 43 163.1773.3833254 44 166.66 62.0690668 45 168.74 84.1 46 174.35 73.3833254 47180 62.0690668 48 180 84.1 49 185.65 73.3833254 50 191.26 84.1 51 193.3462.0690668 52 196.83 73.3833254 53 202.66 84.1 54 206.32 62.8658456 55207.98 73.3833254 56 213.82 84.1 57 218.44 61.760315 58 219.0273.3833254 59 225 84.1 60 230.98 73.3833254 61 231.56 61.760315 62236.18 84.1 63 242.02 73.3833254 64 243.68 62.8658456 65 247.34 84.1 66253.17 73.3833254 67 256.66 62.0690668 68 258.74 84.1 69 264.3573.3833254 70 270 62.0690668 71 270 84.1 72 275.65 73.3833254 73 281.2684.1 74 283.34 62.0690668 75 286.83 73.3833254 76 292.66 84.1 77 296.3262.8658456 78 297.98 73.3833254 79 303.82 84.1 80 308.44 61.760315 81309.02 73.3833254 82 315 84.1 83 320.98 73.3833254 84 321.56 61.76031585 326.18 84.1 86 332.02 73.3833254 87 333.68 62.8658456 88 337.34 84.189 343.17 73.3833254 90 346.66 62.0690668 91 348.74 84.1 92 354.3573.3833254 Dimple # 5 Dimple # 6 Dimple # 7 Type spherical Typespherical Type spherical Radius 0.0670 Radius 0.0725 Radius 0.0750 SCD0.0121 SCD 0.0121 SCD 0.0121 TCD — TCD — TCD — # Phi Theta # Phi Theta #Phi Theta 1 12.73 32.21974 1 0 7.87815 1 8.38 51.07352 2 77.27 32.219742 0 23.47509 2 23.8 52.408124 3 102.73 32.21974 3 0 40.93451 3 66.252.408124 4 167.27 32.21974 4 19.68 42.05 4 81.62 51.07352 5 192.7332.21974 5 25.81 17.61877 5 98.38 51.07352 6 257.27 32.21974 6 32.8728.60436 6 113.8 52.408124 7 282.73 32.21974 7 35.9 39.62978 7 156.252.408124 8 347.27 32.21974 8 37.5 50.62533 8 171.62 51.07352 9 52.550.62533 9 188.38 51.07352 10 54.1 39.62978 10 203.8 52.408124 11 57.1328.60436 11 246.2 52.408124 12 64.19 17.61877 12 261.62 51.07352 1370.32 42.05 13 278.38 51.07352 14 90 7.87815 14 293.8 52.408124 15 9023.47509 15 336.2 52.408124 16 90 40.93451 16 351.62 51.07352 17 109.6842.05 18 115.81 17.61877 19 122.87 28.60436 20 125.9 39.62978 21 127.550.62533 22 142.5 50.62533 23 144.1 39.62978 24 147.13 28.60436 25154.19 17.61877 26 160.32 42.05 27 180 7.87815 28 180 23.47509 29 18040.93451 30 199.68 42.05 31 205.81 17.61877 32 212.87 28.60436 33 215.939.62978 34 217.5 50.62533 35 232.5 50.62533 36 234.1 39.62978 37 237.1328.60436 38 244.19 17.61877 39 250.32 42.05 40 270 7.87815 41 27023.47509 42 270 40.93451 43 289.68 42.05 44 295.81 17.61877 45 302.8728.60436 46 305.9 39.62978 47 307.5 50.62533 48 322.5 50.62533 49 324.139.62978 50 327.13 28.60436 51 334.19 17.61877 52 340.32 42.05

As seen in FIG. 1 and Table 1, the first, larger set of sphericaldimples 14 include dimples of three different radii, specifically 8dimples of a first, smaller radius (0.067 inches), 52 dimples of asecond, larger radius (0.0725 inches) and 16 dimples of a third, largestradius (0.075 inches). Thus, there are a total of 76 larger sphericaldimples 14 in each hemisphere of ball 10. The second, smaller set ofspherical dimples, which are arranged between the larger dimples in aregion closer to the pole, are also in three slightly different sizesfrom approximately 0.03 inches to approximately 0.04 inches, and onehemisphere of the ball includes 37 smaller spherical dimples. Thetruncated dimples are all of the same size and have a radius of 0.067inches (the same as the smallest spherical dimples of the first set) anda truncated chord depth of 0.0039 inches. There are 92 truncated dimplesin one hemisphere of the ball. All of the spherical dimples 14 have thesame spherical chord depth of 0.0121 inches, while the smaller sphericaldimples 15 have a spherical chord depth of 0.008 inches. Thus, thetruncated chord depth of the truncated dimples is significantly lessthan the spherical chord depth of the spherical dimples, and is aboutone third of the depth of the larger spherical dimples 14, and about onehalf the depth of the smaller dimples 15.

With this dimple arrangement, significantly more material is removedfrom the polar regions of the ball to create the larger, deeperspherical dimples, and less material is removed to create the band ofshallower, truncated dimples around the equator. In testing described inmore detail below, the 28-1 dimple pattern of FIG. 1 and Table 1 wasfound to have a preferred spin axis through the poles, as expected, sothat dispersion is reduced if the ball is placed on the tee in a poleshorizontal (PH) orientation. This ball was also found to generaterelatively low lift when the ball spins about the preferred spin axis.

FIG. 2 illustrates one hemisphere of a second embodiment of a ball 16having a different dimple pattern, hereinafter referred to as 25-1,which has three rows of shallow truncated dimples 18 around the ball'sequator in each hemisphere and deep spherical dimples 20 in the polarregion of the ball. The deep dimples closest to the pole also havesmaller dimples 22 dispersed between the larger dimples. The overalldimple pattern in FIG. 2 is similar to that of FIG. 1, but the totalnumber of dimples is less (386). Ball 16 has the same number oftruncated dimples as ball 10, but has fewer spherical dimples of lessvolume than the spherical dimples of ball 10 (see Table 2 below). Eachhemisphere of ball 16 has 92 truncated dimples and 101 spherical dimples20 and 22. The main difference between patterns 28-1 and 25-1 is thatthe 28-1 ball of FIG. 1 has more weight removed from the polar regionsbecause the small dimples between deep dimples are larger in number andvolume for dimple pattern 28-1 compared to 25-1, and the larger, deeperdimples are also of generally larger size for dimple pattern 28-1 thanthe larger spherical dimples in the 25-1 dimple pattern. The largerspherical dimples 20 in the ball 16 are all of the same size, which isequal to the smallest large dimple size in the 28-1 ball. The truncateddimples in FIG. 2 are of the same size as the truncated dimples in FIG.1, and the truncated dimple radius is the same as the radius of thelarger spherical dimples 20.

Shown in Table 2 are the dimple radius, depth and dimple locationinformation for making an injection molding cavity to produce the dimplepattern 25-1 of FIG. 2.

TABLE 2 Dimple Pattern Design# = 25-1 Molding cavity internal diameter =1.694″ Total number of dimples on ball = 386 Dimple # 1 Dimple # 2Dimple # 3 Dimple # 4 Type spherical Type spherical Type truncated Typespherical Radius 0.0300 Radius 0.0350 Radius 0.0670 Radius 0.0670 SCD0.0080 SCD 0.0080 SCD 0.0121 SCD 0.0121 TCD — TCD — TCD 0.0039 TCD — #Phi Theta # Phi Theta # Phi Theta # Phi Theta 1 0 32.02119 1 0 0 1 062.32 1 0 7.91 2 90 32.02119 2 0 15.88024 2 0 84.44 2 0 23.57 3 18032.02119 3 17.72335 25.0536 3 5.65 73.68 3 0 41.1 4 270 32.02119 4 4511.18662 4 11.26 84.44 4 8.38 51.28 5 45 22.47058 5 13.34 62.32 5 12.7332.35 6 72.27665 25.0536 6 16.83 73.68 6 19.68 42.22 7 90 15.88024 722.66 84.44 7 23.8 52.62 8 107.7233 25.0536 8 26.32 63.12 8 25.81 17.699 135 11.18662 9 27.98 73.68 9 32.87 28.72 10 135 22.47058 10 33.8284.44 10 35.9 39.79 11 162.2767 25.0536 11 38.44 62.01 11 37.5 50.83 12180 15.88024 12 39.02 73.68 12 52.5 50.83 13 197.7233 25.0536 13 4584.44 13 54.1 39.79 14 225 11.18662 14 50.98 73.68 14 57.13 28.72 15 22522.47058 15 51.56 62.01 15 64.19 17.69 16 252.2767 25.0536 16 56.1884.44 16 66.2 52.62 17 270 15.88024 17 62.02 73.68 17 70.32 42.22 18287.7233 25.0536 18 63.68 63.12 18 77.27 32.35 19 315 11.18662 19 67.5884.44 19 81.62 51.28 20 315 22.47058 20 73.17 73.68 20 90 7.91 21342.2767 25.0536 21 76.66 62.32 21 90 23.57 22 78.84 84.44 22 90 41.1 2384.35 73.68 23 98.38 51.28 24 90 62.32 24 102.73 32.35 25 90 84.44 25109.68 42.22 26 95.65 73.68 26 113.8 52.62 27 101.26 84.44 27 115.8117.69 28 103.34 62.32 28 122.87 28.72 29 106.83 73.68 29 125.9 39.79 30112.66 84.44 30 127.5 50.83 31 116.32 63.12 31 142.5 50.83 32 117.9873.68 32 144.1 39.79 33 123.82 84.44 33 147.13 28.72 34 128.44 62.01 34154.19 17.69 35 129.02 73.68 35 156.2 52.62 36 135 84.44 36 160.32 42.2237 140.98 73.68 37 167.27 32.35 38 141.56 62.01 38 171.62 51.28 39146.18 84.44 39 180 7.91 40 152.02 73.68 40 180 23.57 41 153.68 63.12 41180 41.1 42 157.58 84.44 42 188.38 51.28 43 163.17 73.68 43 192.73 32.3544 166.66 62.32 44 199.68 42.22 45 168.84 84.44 45 203.8 52.62 46 174.3573.68 46 205.81 17.69 47 180 84.44 47 212.87 28.72 48 180 62.32 48 215.939.79 49 185.65 73.68 49 217.5 50.83 50 191.26 84.44 50 232.5 50.83 51193.34 62.32 51 234.1 39.79 52 196.83 73.68 52 237.13 28.72 53 202.6684.44 53 244.19 17.69 54 206.32 63.12 54 246.2 52.62 55 207.98 73.68 55250.32 42.22 56 213.82 84.44 56 257.27 32.35 57 218.44 62.01 57 261.6251.28 58 219.02 73.68 58 270 7.91 59 225 84.44 59 270 23.57 60 230.9873.68 60 270 41.1 61 231.56 62.01 61 278.38 51.28 62 236.18 84.44 62282.73 32.35 63 242.02 73.68 63 289.68 42.22 64 243.68 63.12 64 293.852.62 65 247.58 84.44 65 295.81 17.69 66 253.17 73.68 66 302.87 28.72 67256.66 62.32 67 305.9 39.79 68 258.84 84.44 68 307.5 50.83 69 264.3573.68 69 322.5 50.83 70 270 62.32 70 324.1 39.79 71 270 84.44 71 327.1328.72 72 275.65 73.68 72 334.19 17.69 73 281.26 84.44 73 336.2 52.62 74283.34 62.32 74 340.32 42.22 75 286.83 73.68 75 347.27 32.35 76 292.6684.44 76 351.62 51.28 77 296.32 63.12 78 297.98 73.68 79 303.82 84.44 80308.44 62.01 81 309.02 73.68 82 315 84.44 83 320.98 73.68 84 321.5662.01 85 326.18 84.44 86 332.02 73.68 87 333.68 63.12 88 337.58 84.44 89343.17 73.68 90 346.66 62.32 91 348.84 84.44 92 354.35 73.68

As indicated in Table 2, ball 25-1 has only two different size smallerspherical dimples 22 in the polar region (dimples 1 and 2 which are thesame size as dimples 1 and 2 of the 28-1 ball), and only one size largerspherical dimple 20, i.e. dimple 4 which is the same size as dimple 5 ofthe 28-1 ball. Thus, the 28-1 ball has some spherical dimples,specifically dimples 6 and 7 in Table 1, which are of larger diameterthan any of the spherical dimples 20 of the 25-1 ball.

FIG. 3 illustrates a mold 23 having one hemisphere of a compressionmolding cavity 24 designed for making a third embodiment of a ballhaving a different dimple pattern, identified as dimple pattern or ball2-9. The cavity 24 has three rows of raised, flattened bumps 25 designedto form three rows of shallow, truncated dimples around the ball'sequator, and a polar region having raised, generally hemispherical bumps26 designed to form deep, spherical dimples in the polar region of aball. The resultant dimple pattern has three rows of shallow truncateddimples around the ball's equator and deep spherical dimples 2 in thepolar region of the ball in each hemisphere of the ball. As illustratedin FIG. 3 and shown in Table 3 below, there is only one size oftruncated dimple and one size of spherical dimple in the 2-9 dimplepattern. The truncated dimples are identified as dimple #1 in Table 3below, and the spherical dimples are identified as dimple #2 in Table 3.The 2-9 ball has a total of 336 dimples, with 92 truncated dimples ofthe same size as the truncated dimples of the 28-1 and 25-1 balls, and76 deep spherical dimples which are all the same size as the largespherical dimples of the 25-1 ball. Thus, about the same dimple volumeis removed around the equator in balls 28-1, 25-1 and 2-9, but moredimple volume is removed in the polar region in ball 28-1 than in balls25-1 and 2-9, and ball 2-9 has less volume removed in the polar regionsthan balls 28-1 and 25-1.

It will be understood that a similar type of mold, or set of molds, isused for all of the embodiments described herein, and that mold 23 isshown by way of example only.

TABLE 3 Dimple Pattern Design# 2-9 Molding cavity internal diameter =1.694″ Total number of dimples on ball = 336 Dimple # 1 Dimple # 2 Typetruncated Type spherical Radius 0.0670 Radius 0.0670 SCD 0.0121 SCD0.0121 TCD 0.0039 TCD — # Phi Theta # Phi Theta 1 0 62.32 1 0 7.91 25.58 84.44 2 0 23.57 3 5.65 73.68 3 0 41.1 4 13.34 62.32 4 8.38 51.28 516.83 73.68 5 12.73 32.35 6 16.84 84.44 6 19.68 42.22 7 26.32 63.12 723.8 52.62 8 27.98 73.68 8 25.81 17.69 9 28.24 84.44 9 32.87 28.72 1038.44 62.01 10 35.9 39.79 11 39.02 73.68 11 37.5 50.83 12 39.4 84.44 1252.5 50.83 13 50.6 84.44 13 54.1 39.79 14 50.98 73.68 14 57.13 28.72 1551.56 62.01 15 64.19 17.69 16 61.76 84.44 16 66.2 52.62 17 62.02 73.6817 70.32 42.22 18 63.68 63.12 18 77.27 32.35 19 73.16 84.44 19 81.6251.28 20 73.17 73.68 20 90 7.91 21 76.66 62.32 21 90 23.57 22 84.3573.68 22 90 41.1 23 84.42 84.44 23 98.38 51.28 24 90 62.32 24 102.7332.35 25 95.58 84.44 25 109.68 42.22 26 95.65 73.68 26 113.8 52.62 27103.34 62.32 27 115.81 17.69 28 106.83 73.68 28 122.87 28.72 29 106.8484.44 29 125.9 39.79 30 116.32 63.12 30 127.5 50.83 31 117.98 73.68 31142.5 50.83 32 118.24 84.44 32 144.1 39.79 33 128.44 62.01 33 147.1328.72 34 129.02 73.68 34 154.19 17.69 35 129.4 84.44 35 156.2 52.62 36140.6 84.44 36 160.32 42.22 37 140.98 73.68 37 167.27 32.35 38 141.5662.01 38 171.62 51.28 39 151.76 84.44 39 180 7.91 40 152.02 73.68 40 18023.57 41 153.68 63.12 41 180 41.1 42 163.16 84.44 42 188.38 51.28 43163.17 73.68 43 192.73 32.35 44 166.66 62.32 44 199.68 42.22 45 174.3573.68 45 203.8 52.62 46 174.42 84.44 46 205.81 17.69 47 180 62.32 47212.87 28.72 48 185.58 84.44 48 215.9 39.79 49 185.65 73.68 49 217.550.83 50 193.34 62.32 50 232.5 50.83 51 196.83 73.68 51 234.1 39.79 52196.84 84.44 52 237.13 28.72 53 206.32 63.12 53 244.19 17.69 54 207.9873.68 54 246.2 52.62 55 208.24 84.44 55 250.32 42.22 56 218.44 62.01 56257.27 32.35 57 219.02 73.68 57 261.62 51.28 58 219.4 84.44 58 270 7.9159 230.6 84.44 59 270 23.57 60 230.98 73.68 60 270 41.1 61 231.56 62.0161 278.38 51.28 62 241.76 84.44 62 282.73 32.35 63 242.02 73.68 63289.68 42.22 64 243.68 63.12 64 293.8 52.62 65 253.16 84.44 65 295.8117.69 66 253.17 73.68 66 302.87 28.72 67 256.66 62.32 67 305.9 39.79 68264.35 73.68 68 307.5 50.83 69 264.42 84.44 69 322.5 50.83 70 270 62.3270 324.1 39.79 71 275.58 84.44 71 327.13 28.72 72 275.65 73.68 72 334.1917.69 73 283.34 62.32 73 336.2 52.62 74 286.83 73.68 74 340.32 42.22 75286.84 84.44 75 347.27 32.35 76 296.32 63.12 76 351.62 51.28 77 297.9873.68 78 298.24 84.44 79 308.44 62.01 80 309.02 73.68 81 309.4 84.44 82320.6 84.44 83 320.98 73.68 84 321.56 62.01 85 331.76 84.44 86 332.0273.68 87 333.68 63.12 88 343.16 84.44 89 343.17 73.68 90 346.66 62.32 91354.35 73.68 92 354.42 84.44

Table 4 below lists dimple shapes, dimensions, and coordinates orlocations on a ball for a dimple pattern 28-2 which is very similar tothe dimple pattern 28-1 and is therefore not shown separately in thedrawings. The ball with dimple pattern 28-2 has three larger sphericaldimples of different dimensions, numbered 5, 6 and 7 in Table 4, andthree smaller spherical dimples of different dimensions, numbered 1, 2and 3, and the dimensions of these dimples are identical to thecorresponding dimples of the 28-1 ball in Table 1, as are the dimensionsof truncated dimples numbered 4 in Table 4. The dimple pattern 28-2 isnearly identical to dimple pattern 28-1, except that the seam thatseparates the two hemispheres of the ball is wider in the 28-2 ball, andthe coordinates of some of the dimples are slightly different, as can bedetermined by comparing Tables 1 and 4.

The dimple coordinates for pattern 28-2 are shown in table 4 below.

TABLE 4 Dimple Pattern Design# 28-2 Molding cavity internal diameter =1.692″ Total number of dimples on ball = 410 Dimple # 1 Dimple # 2Dimple # 3 Type spherical Type spherical Type spherical Radius 0.0300Radius 0.0350 Radius 0.0400 SCD 0.0080 SCD 0.0080 SCD 0.0080 TCD — TCD —TCD — # Phi Theta # Phi Theta # Phi Theta 1 0 31.8922591 1 0 15.816302 10 0 2 90 31.8922591 2 17.723349 24.952723 2 45 11.14157 3 180 31.89225913 25.269266 35.262662 3 45 22.3801 4 270 31.8922591 4 64.73073435.262662 4 45 33.66965 5 72.276651 24.952723 5 135 11.14157 6 9015.816302 6 135 22.3801 7 107.72335 24.952723 7 135 33.66965 8 115.2692735.262662 8 225 11.14157 9 154.73073 35.262662 9 225 22.3801 10162.27665 24.952723 10 225 33.66965 11 180 15.816302 11 315 11.14157 12197.72335 24.952723 12 315 22.3801 13 205.26927 35.262662 13 31533.66965 14 244.73073 35.262662 15 252.27665 24.952723 16 270 15.81630217 287.72335 24.952723 18 295.26927 35.262662 19 334.73073 35.262662 20342.27665 24.952723 Dimple # 5 Dimple # 6 Dimple # 7 Type spherical Typespherical Type spherical Radius 0.0670 Radius 0.0725 Radius 0.0750 SCD0.0121 SCD 0.0121 SCD 0.0121 TCD — TCD — TCD — # Phi Theta # Phi Theta #Phi Theta 1 12.73 32.2197418 1 0 7.8781502 1 8.38 51.07352 2 77.2732.2197418 2 0 23.475095 2 23.8 52.40812 3 102.73 32.2197418 3 040.93451 3 66.2 52.40812 4 167.27 32.2197418 4 19.68 42.05 4 81.6251.07352 5 192.73 32.2197418 5 25.81 17.618771 5 98.38 51.07352 6 257.2732.2197418 6 32.87 28.604358 6 113.8 52.40812 7 282.73 32.2197418 7 35.939.629784 7 156.2 52.40812 8 347.27 32.2197418 8 37.5 50.625332 8 171.6251.07352 9 52.5 50.625332 9 188.38 51.07352 10 54.1 39.629784 10 203.852.40812 11 57.13 28.604358 11 246.2 52.40812 12 64.19 17.618771 12261.62 51.07352 13 70.32 42.05 13 278.38 51.07352 14 90 7.8781502 14293.8 52.40812 15 90 23.475095 15 336.2 52.40812 16 90 40.93451 16351.62 51.07352 Dimple # 4 Dimple # 4 Dimple # 6 Type truncated Typetruncated Type spherical Radius 0.0670 Radius 0.0670 Radius 0.0725 SCD0.0121 SCD 0.0121 SCD 0.0121 TCD 0.0039 TCD 0.0039 TCD — # Phi Theta #Phi Theta # Phi Theta 1 0 62.06907 45 44 106.0691 17 109.68 42.05 2 163.06907 46 45 107.0691 18 115.81 17.61877 3 2 64.06907 47 46 108.069119 122.87 28.60436 4 3 65.06907 48 47 109.0691 20 125.9 39.62978 5 466.06907 49 48 110.0691 21 127.5 50.62533 6 5 67.06907 50 49 111.0691 22142.5 50.62533 7 6 68.06907 51 50 112.0691 23 144.1 39.62978 8 769.06907 52 51 113.0691 24 147.13 28.60436 9 8 70.06907 53 52 114.069125 154.19 17.61877 10 9 71.06907 54 53 115.0691 26 160.32 42.05 11 1072.06907 55 54 116.0691 27 180 7.87815 12 11 73.06907 56 55 117.0691 28180 23.47509 13 12 74.06907 57 56 118.0691 29 180 40.93451 14 1375.06907 58 57 119.0691 30 199.68 42.05 15 14 76.06907 59 58 120.0691 31205.81 17.61877 16 15 77.06907 60 59 121.0691 32 212.87 28.60436 17 1678.06907 61 60 122.0691 33 215.9 39.62978 18 17 79.06907 62 61 123.069134 217.5 50.62533 19 18 80.06907 63 62 124.0691 35 232.5 50.62533 20 1981.06907 64 63 125.0691 36 234.1 39.62978 21 20 82.06907 65 64 126.069137 237.13 28.60436 22 21 83.06907 66 65 127.0691 38 244.19 17.61877 2322 84.06907 67 66 128.0691 39 250.32 42.05 24 23 85.06907 68 67 129.069140 270 7.87815 25 24 86.06907 69 68 130.0691 41 270 23.47509 26 2587.06907 70 69 131.0691 42 270 40.93451 27 26 88.06907 71 70 132.0691 43289.68 42.05 28 27 89.06907 72 71 133.0691 44 295.81 17.61877 29 2890.06907 73 72 134.0691 45 302.87 28.60436 30 29 91.06907 74 73 135.069146 305.9 39.62978 31 30 92.06907 75 74 136.0691 47 307.5 50.62533 32 3193.06907 76 75 137.0691 48 322.5 50.62533 33 32 94.06907 77 76 138.069149 324.1 39.62978 34 33 95.06907 78 77 139.0691 50 327.13 28.60436 35 3496.06907 79 78 140.0691 51 334.19 17.61877 36 35 97.06907 80 79 141.069152 340.32 42.05 37 36 98.06907 81 80 142.0691 38 37 99.06907 82 81143.0691 39 38 100.0691 83 82 144.0691 40 39 101.0691 84 83 145.0691 4140 102.0691 85 84 146.0691 42 41 103.0691 86 85 147.0691 43 42 104.069187 86 148.0691 44 43 105.0691 88 87 149.0691 89 88 150.0691 90 89151.0691 91 90 152.0691 92 91 153.0691

FIGS. 4 to 6 illustrate hemispheres of three different balls 30, 40 and50 with different dimple patterns. The dimple patterns on balls 30, 40and 50 are hereinafter referred to as dimple patterns 25-2, 25-3, and25-4. Dimple patterns 25-2, 25-3 and 25-4 are related in that they havebasically the same design except that each has a different number ofrows of truncated dimples surrounding the equator. The dimple dimensionsand positions for the balls of FIGS. 4 to 6 are provided below in Tables5, 6 and 7, respectively.

Ball 30 or 25-2 of FIG. 4 has two rows of shallow truncated dimples 32adjacent the equator in each hemisphere (i.e., a total of four rows inthe complete ball), and spherical dimples 34 in each polar region. Asindicated in Table 5, there are two different sizes of spherical dimples34, and two different sizes of truncated dimple 32.

Ball 40 or 25-3 of FIG. 5 has four rows of shallow, truncated dimples 42adjacent the equator in each hemisphere (i.e. a circumferential band ofeight rows of shallow truncated dimples about the equator), and deepspherical dimples 44 in each polar region. As illustrated in FIG. 5 andindicated in Table 6, the truncated dimples 42 are of three differentsizes, with the largest size dimples 42A located only in the third andfourth rows of dimples from the equator (i.e. the two rows closest tothe polar region). Ball 40 also has spherical dimples with slightlydifferent radii, as indicated in Table 6.

Ball 50 or 25-4 of FIG. 6 has three rows of shallow, truncated dimples52 on each side of the equator (i.e. a circumferential band of six rowsof dimples around the equator) and deep spherical dimples 54 in eachpolar region. Ball 50 has spherical dimples of three different radii andtruncated dimples which are also of three different radii, as indicatedin Table 7. As illustrated in FIG. 6 and indicated in Table 7 below, thethird row of truncated dimples, i.e. the row adjacent to the polarregion, has some larger truncated dimples 52A, which are three of thelargest truncated dimples identified as Dimple #5 in Table 7. Theadjacent polar region also has some larger spherical dimples 54Aarranged in a generally triangular pattern with the larger truncateddimples, as illustrated in FIG. 6. Dimples 54A are three of the largestspherical dimples identified as Dimple #6 in Table 7. As seen in Table7, there are twelve total large truncated dimples #5 and twelve totallarge spherical dimples #6, all with a radius of 0.0875 inches. FIG. 6illustrates the triangular arrangement of three large truncated dimplesand three large spherical dimples at one location. Similar arrangementsare provided at three equally spaced locations around the remainder ofthe hemisphere of the ball illustrated in FIG. 6.

As indicated in Tables 5, 6, and 7 below, the balls 25-2 and 25-3 eachhave three different sizes of truncated dimple in the equatorial regionand two different sizes of spherical dimple in the polar region, whileball 25-4 has three different sizes of truncated dimple as well as threedifferent sizes of spherical dimple. The polar region of dimples islargest in ball 25-2, which has four rows of truncated dimples (two rowsper hemisphere) in the equatorial region, and smallest in ball 25-3,which has eight rows of truncated dimples in the equatorial region. Inalternative embodiments, balls may be made with a single row oftruncated dimples in each hemisphere, as well as with a land area havingno dimples in an equatorial region, the land area or band having a widthequal to two, four or more rows of dimples, or with a band havingregions with dimples alternating with land regions with no dimplesspaced around the equator.

TABLE 5 Dimple Pattern Design# = 25-2 Molding cavity internal diameter =1.694″ Total number of dimples on ball = 336 Dimple # 1 Dimple # 2Dimple # 3 Type truncated Type spherical Type truncated Radius 0.0775Radius 0.0775 Radius 0.0800 SCD 0.0121 SCD 0.0121 SCD 0.0121 TCD 0.0039TCD — TCD 0.0039 # Phi Theta # Phi Theta # Phi Theta 1 5.579593 73.519941 0 23.4884 1 5.591675 85.23955 2 16.75313 73.52028 2 13.0186 32.3247 216.84626 85.23955 3 27.91657 73.52668 3 19.9156 42.17697 3 28.2914585.23955 4 62.08343 73.52668 4 24.008 52.43641 4 39.24409 73.35107 573.24687 73.52028 5 26.4186 62.92891 5 39.40674 85.23955 6 84.4204173.51994 6 63.5814 62.92891 6 50.59326 85.23955 7 95.57959 73.51994 765.992 52.43641 7 50.75591 73.35107 8 106.7531 73.52028 8 70.084442.17697 8 61.70855 85.23955 9 117.9166 73.52668 9 76.9814 32.3247 973.15374 85.23955 10 152.0834 73.52668 10 90 23.4884 10 84.4083385.23955 11 163.2469 73.52028 11 103.019 32.3247 11 95.59167 85.23955 12174.4204 73.51994 12 109.916 42.17697 12 106.8463 85.23955 13 185.579673.51994 13 114.008 52.43641 13 118.2915 85.23955 14 196.7531 73.5202814 116.419 62.92891 14 129.2441 73.35107 15 207.9166 73.52668 15 153.58162.92891 15 129.4067 85.23955 16 242.0834 73.52668 16 155.992 52.4364116 140.5933 85.23955 17 253.2469 73.52028 17 160.084 42.17697 17140.7559 73.35107 18 264.4204 73.51994 18 166.981 32.3247 18 151.708585.23955 19 275.5796 73.51994 19 180 23.4884 19 163.1537 85.23955 20286.7531 73.52028 20 193.019 32.3247 20 174.4083 85.23955 21 297.916673.52668 21 199.916 42.17697 21 185.5917 85.23955 22 332.0834 73.5266822 204.008 52.43641 22 196.8463 85.23955 23 343.2469 73.52028 23 206.41962.92891 23 208.2915 85.23955 24 354.4204 73.51994 24 243.581 62.9289124 219.2441 73.35107 25 245.992 52.43641 25 219.4067 85.23955 26 250.08442.17697 26 230.5933 85.23955 27 256.981 32.3247 27 230.7559 73.35107 28270 23.4884 28 241.7085 85.23955 29 283.019 32.3247 29 253.1537 85.2395530 289.916 42.17697 30 264.4083 85.23955 31 294.008 52.43641 31 275.591785.23955 32 296.419 62.92891 32 286.8463 85.23955 33 333.581 62.92891 33298.2915 85.23955 34 335.992 52.43641 34 309.2441 73.35107 35 340.08442.17697 35 309.4067 85.23955 36 346.981 32.3247 36 320.5933 85.23955 37320.7559 73.35107 38 331.7085 85.23955 39 343.1537 85.23955 40 354.408385.23955 Dimple # 4 Dimple # 5 Type truncated Type spherical Radius0.0800 Radius 0.0875 SCD 0.0121 SCD 0.0121 TCD 0.0039 TCD — # Phi Theta# Phi Theta  1 0 7.947466 1 0 40.85302  2 26.63272 17.75117 2 0 62.32899 3 33.30007 28.68155 3 8.422648 51.28898  4 36.11617 39.79409 4 13.6056262.53208  5 37.72952 50.95749 5 76.39438 62.53208  6 38.62814 62.14951 681.57735 51.28898  7 51.37186 62.14951 7 90 40.85302  8 52.2704850.95749 8 90 62.32899  9 53.88383 39.79409 9 98.42265 51.28898 1056.69993 28.68155 10 103.6056 62.53208 11 63.36728 17.75117 11 166.394462.53208 12 90 7.947466 12 171.5774 51.28898 13 116.6327 17.75117 13 18040.85302 14 123.3001 28.68155 14 180 62.32899 15 126.1162 39.79409 15188.4226 51.28898 16 127.7295 50.95749 16 193.6056 62.53208 17 128.628162.14951 17 256.3944 62.53208 18 141.3719 62.14951 18 261.5774 51.2889819 142.2705 50.95749 19 270 40.85302 20 143.8838 39.79409 20 27062.32899 21 146.6999 28.68155 21 278.4226 51.28898 22 153.3673 17.7511722 283.6056 62.53208 23 180 7.947466 23 346.3944 62.53208 24 206.632717.75117 24 351.5774 51.28898 25 213.3001 28.68155 26 216.1162 39.7940927 217.7295 50.95749 28 218.6281 62.14951 29 231.3719 62.14951 30232.2705 50.95749 31 233.8838 39.79409 32 236.6999 28.68155 33 243.367317.75117 34 270 7.947466 35 296.6327 17.75117 36 303.3001 28.68155 37306.1162 39.79409 38 307.7295 50.95749 39 308.6281 62.14951 40 321.371962.14951 41 322.2705 50.95749 42 323.8838 39.79409 43 326.6999 28.6815544 333.3673 17.75117

TABLE 6 Dimple Pattern Design# = 25-3 Molding cavity internal diameter =1.694″ Total number of dimples on ball = 336 Dimple # 1 Dimple # 2Dimple # 3 Dimple # 4 Dimple # 5 Type spherical Type truncated Typespherical Type truncated Type truncated Radius 0.0775 Radius 0.0800Radius 0.0800 Radius 0.0775 Radius 0.0875 SCD 0.0121 SCD 0.0121 SCD0.0121 SCD 0.0121 SCD 0.0121 TCD — TCD 0.0039 TCD — TCD 0.0039 TCD0.0039 # Phi Theta # Phi Theta # Phi Theta # Phi Theta # Phi Theta 1 023.4884 1 5.591675 85.23955 1 0 7.947466 1 5.579593 73.51994 1 062.32899 2 13.0186 32.3247 2 16.84626 85.23955 2 26.63272 17.75117 216.75313 73.52028 2 8.42265 51.28898 3 19.9156 42.17697 3 28.2914585.23955 3 33.30007 28.68155 3 24.00802 52.43641 3 13.6056 62.53208 470.0844 42.17697 4 37.72952 50.95749 4 36.11617 39.79409 4 26.4185562.92891 4 76.3944 62.53208 5 76.9814 32.3247 5 38.62814 62.14951 553.88383 39.79409 5 27.91657 73.52668 5 81.5774 51.28898 6 90 23.4884 639.24409 73.35107 6 56.69993 28.68155 6 62.08343 73.52668 6 90 62.328997 103.019 32.3247 7 39.40674 85.23955 7 63.36728 17.75117 7 63.5814562.92891 7 98.4226 51.28898 8 109.916 42.17697 8 50.59326 85.23955 8 907.947466 8 65.99198 52.43641 8 103.606 62.53208 9 160.084 42.17697 950.75591 73.35107 9 116.6327 17.75117 9 73.24687 73.52028 9 166.39462.53208 10 166.981 32.3247 10 51.37186 62.14951 10 123.3001 28.68155 1084.42041 73.51994 10 171.577 51.28898 11 180 23.4884 11 52.2704850.95749 11 126.1162 39.79409 11 95.57959 73.51994 11 180 62.32899 12193.019 32.3247 12 61.70855 85.23955 12 143.8838 39.79409 12 106.753173.52028 12 188.423 51.28898 13 199.916 42.17697 13 73.15374 85.23955 13146.6999 28.68155 13 114.008 52.43641 13 193.606 62.53208 14 250.08442.17697 14 84.40833 85.23955 14 153.3673 17.75117 14 116.4186 62.9289114 256.394 62.53208 15 256.981 32.3247 15 95.59167 85.23955 15 1807.947466 15 117.9166 73.52668 15 261.577 51.28898 16 270 23.4884 16106.8463 85.23955 16 206.6327 17.75117 16 152.0834 73.52668 16 27062.32899 17 283.019 32.3247 17 118.2915 85.23955 17 213.3001 28.68155 17153.5814 62.92891 17 278.423 51.28898 18 289.916 42.17697 18 127.729550.95749 18 216.1162 39.79409 18 155.992 52.43641 18 283.606 62.53208 19340.084 42.17697 19 128.6281 62.14951 19 233.8838 39.79409 19 163.246973.52028 19 346.394 62.53208 20 346.981 32.3247 20 129.2441 73.35107 20236.6999 28.68155 20 174.4204 73.51994 20 351.577 51.28898 21 129.406785.23955 21 243.3673 17.75117 21 185.5796 73.51994 21 0 40.85302 22140.5933 85.23955 22 270 7.947466 22 196.7531 73.52028 22 90 40.85302 23140.7559 73.35107 23 296.6327 17.75117 23 204.008 52.43641 23 18040.85302 24 141.3719 62.14951 24 303.3001 28.68155 24 206.4186 62.9289124 270 40.85302 25 142.2705 50.95749 25 306.1162 39.79409 25 207.916673.52668 26 151.7085 85.23955 26 323.8838 39.79409 26 242.0834 73.5266827 163.1537 85.23955 27 326.6999 28.68155 27 243.5814 62.92891 28174.4083 85.23955 28 333.3673 17.75117 28 245.992 52.43641 29 185.591785.23955 29 253.2469 73.52028 30 196.8463 85.23955 30 264.4204 73.5199431 208.2915 85.23955 31 275.5796 73.51994 32 217.7295 50.95749 32286.7531 73.52028 33 218.6281 62.14951 33 294.008 52.43641 34 219.244173.35107 34 296.4186 62.92891 35 219.4067 85.23955 35 297.9166 73.5266836 230.5933 85.23955 36 332.0834 73.52668 37 230.7559 73.35107 37333.5814 62.92891 38 231.3719 62.14951 38 335.992 52.43641 39 232.270550.95749 39 343.2469 73.52028 40 241.7085 85.23955 40 354.4204 73.5199441 253.1537 85.23955 42 264.4083 85.23955 43 275.5917 85.23955 44286.8463 85.23955 45 298.2915 85.23955 46 307.7295 50.95749 47 308.628162.14951 48 309.2441 73.35107 49 309.4067 85.23955 50 320.5933 85.2395551 320.7559 73.35107 52 321.3719 62.14951 53 322.2705 50.95749 54331.7085 85.23955 55 343.1537 85.23955 56 354.4083 85.23955

TABLE 7 Dimple Pattern Design# = 25-4 Molding cavity internal diameter =1.694″ Total number of dimples on ball = 336 Dimple # 1 Dimple # 2Dimple # 3 Dimple # 4 Type truncated Type spherical Type truncated Typespherical Radius 0.0775 Radius 0.0775 Radius 0.0800 Radius 0.0800 SCD0.0121 SCD 0.0121 SCD 0.0121 SCD 0.0121 TCD 0.0039 TCD — TCD 0.0039 TCD— # Phi Theta # Phi Theta # Phi Theta # Phi Theta 1 5.579593 73.51993691 0 23.4884 1 5.591675 85.2395467 1 0 7.947466 2 16.75313 73.5202824 213.0186 32.3247 2 16.84626 85.2395467 2 26.63272 17.75117 3 26.4185562.9289055 3 19.9156 42.17697 3 28.29145 85.2395467 3 33.30007 28.681554 27.91657 73.5266783 4 24.008 52.43641 4 38.62814 62.1495131 4 36.1161739.79409 5 62.08343 73.5266783 5 65.992 52.43641 5 39.24409 73.3510713 537.72952 50.95749 6 63.58145 62.9289055 6 70.0844 42.17697 6 39.4067485.2395467 6 52.27048 50.95749 7 73.24687 73.5202824 7 76.9814 32.3247 750.59326 85.2395467 7 53.88383 39.79409 8 84.42041 73.5199369 8 9023.4884 8 50.75591 73.3510713 8 56.69993 28.68155 9 95.57959 73.51993699 103.019 32.3247 9 51.37186 62.1495131 9 63.36728 17.75117 10 106.753173.5202824 10 109.916 42.17697 10 61.70855 85.2395467 10 90 7.947466 11116.4186 62.9289055 11 114.008 52.43641 11 73.15374 85.2395467 11116.6327 17.75117 12 117.9166 73.5266783 12 155.992 52.43641 12 84.4083385.2395467 12 123.3001 28.68155 13 152.0834 73.5266783 13 160.08442.17697 13 95.59167 85.2395467 13 126.1162 39.79409 14 153.581462.9289055 14 166.981 32.3247 14 106.8463 85.2395467 14 127.729550.95749 15 163.2469 73.5202824 15 180 23.4884 15 118.2915 85.2395467 15142.2705 50.95749 16 174.4204 73.5199369 16 193.019 32.3247 16 128.628162.1495131 16 143.8838 39.79409 17 185.5796 73.5199369 17 199.91642.17697 17 129.2441 73.3510713 17 146.6999 28.68155 18 196.753173.5202824 18 204.008 52.43641 18 129.4067 85.2395467 18 153.367317.75117 19 206.4186 62.9289055 19 245.992 52.43641 19 140.593385.2395467 19 180 7.947466 20 207.9166 73.5266783 20 250.084 42.17697 20140.7559 73.3510713 20 206.6327 17.75117 21 242.0834 73.5266783 21256.981 32.3247 21 141.3719 62.1495131 21 213.3001 28.68155 22 243.581462.9289055 22 270 23.4884 22 151.7085 85.2395467 22 216.1162 39.79409 23253.2469 73.5202824 23 283.019 32.3247 23 163.1537 85.2395467 23217.7295 50.95749 24 264.4204 73.5199369 24 289.916 42.17697 24 174.408385.2395467 24 232.2705 50.95749 25 275.5796 73.5199369 25 294.00852.43641 25 185.5917 85.2395467 25 233.8838 39.79409 26 286.753173.5202824 26 335.992 52.43641 26 196.8463 85.2395467 26 236.699928.68155 27 296.4186 62.9289055 27 340.084 42.17697 27 208.291585.2395467 27 243.3673 17.75117 28 297.9166 73.5266783 28 346.98132.3247 28 218.6281 62.1495131 28 270 7.947466 29 332.0834 73.5266783 29219.2441 73.3510713 29 296.6327 17.75117 30 333.5814 62.9289055 30219.4067 85.2395467 30 303.3001 28.68155 31 343.2469 73.5202824 31230.5933 85.2395467 31 306.1162 39.79409 32 354.4204 73.5199369 32230.7559 73.3510713 32 307.7295 50.95749 33 231.3719 62.1495131 33322.2705 50.95749 34 241.7085 85.2395467 34 323.8838 39.79409 35253.1537 85.2395467 35 326.6999 28.68155 36 264.4083 85.2395467 36333.3673 17.75117 37 275.5917 85.2395467 38 286.8463 85.2395467 39298.2915 85.2395467 40 308.6281 62.1495131 41 309.2441 73.3510713 42309.4067 85.2395467 43 320.5933 85.2395467 44 320.7559 73.3510713 45321.3719 62.1495131 46 331.7085 85.2395467 47 343.1537 85.2395467 48354.4083 85.2395467 Dimple # 5 Dimple # 6 Type truncated Type sphericalRadius 0.0875 Radius 0.0875 SCD 0.0121 SCD 0.0121 TCD 0.0039 TCD — # PhiTheta # Phi Theta 1 0 62.3289928 1 0 40.85302 2 13.60562 62.5320764 28.42265 51.28898 3 76.39438 62.5320764 3 81.5774 51.28898 4 9062.3289928 4 90 40.85302 5 103.6056 62.5320764 5 98.4226 51.28898 6166.3944 62.5320764 6 171.577 51.28898 7 180 62.3289928 7 180 40.85302 8193.6056 62.5320764 8 188.423 51.28898 9 256.3944 62.5320764 9 261.57751.28898 10  270 62.3289928 10 270 40.85302 11  283.6056 62.5320764 11278.423 51.28898 12  346.3944 62.5320764 12 351.577 51.28898

Dimple patterns 25-2, 25-3 and 25-4 are similar to pattern 2-9 in thatthey have truncated dimples around the equatorial region and deeperdimples around the pole region, but the truncated dimples in patterns25-2, 25-3 and 25-4 are of larger diameter than the truncated dimples ofpatterns 28-1, 25-1 and 2-9. The larger truncated dimples near theequator means that more weight is removed from the equator area. Withall other factors being equal, this means that there is a smaller MOIdifference between the PH and POP orientations for balls 25-2, 25-3 and25-4 than for balls 28-1, 28-2, 25-1 and 2-9.

FIG. 7 illustrates one hemisphere of a golf ball 60 according to anotherembodiment, which has a different dimple pattern identified as dimplepattern 28-3 in the following description. Dimple pattern 28-3 of ball60 comprises three rows of truncated dimples 62 on each side of theequator, an area of small spherical dimples 64 at each pole, and an areaof larger, deep spherical dimples 65 between dimples 64 and dimples 62.Table 8 indicates the dimple parameters and coordinates for golf ball60. As illustrated in Table 8, ball 28-3 has one size of truncateddimple, four sizes of larger spherical dimples (dimple numbers 2, 3, 5and 6) and one size of smaller spherical dimple (dimple number 1) in thepolar regions.

As indicated in Table 8 and FIG. 7, the small spherical dimples 64 atthe pole are all of the same radius, and there are thirteen dimples 64arranged in a generally square pattern centered on the pole of eachhemisphere. There are four different larger spherical dimples 65 (dimplenumbers 2 to 6 of Table 8) of progressively increasing radius from 0.075inches to 0.0825 inches. The ball with dimple pattern 28-3 also has apreferred spin axis through the poles due to the weight differencecaused by locating a larger volume of dimples in each polar region thanin the equatorial band around the equator.

The dimple parameters and coordinates for making one hemisphere of the28-3 ball are listed below in Table 8.

TABLE 8 Dimple Pattern Design# 28-3 Molding cavity internal diameter =1.692″ Total number of dimples on ball = 354 Dimple # 1 Dimple # 2Dimple # 3 Type spherical Type spherical Type spherical Radius 0.0475Radius 0.0750 Radius 0.0775 SCD 0.0080 SCD 0.0080 SCD 0.0080 TCD — TCD —TCD — # Phi Theta # Phi Theta # Phi Theta 1 0 0 1 12.927785 31.884481 10 23.102459 2 0 6.6748046 2 77.072215 31.884481 2 27.477912 18.124586 30 13.353545 3 102.92779 31.884481 3 62.522088 18.124586 4 45 9.4610963 4167.07221 31.884481 4 90 23.102459 5 90 6.6748046 5 192.92779 31.8844815 117.47791 18.124586 6 90 13.353545 6 257.07221 31.884481 6 152.5220918.124586 7 135 9.4610963 7 282.92779 31.884481 7 180 23.102459 8 1806.6748046 8 347.07221 31.884481 8 207.47791 18.124586 9 180 13.353545 9242.52209 18.124586 10 225 9.4610963 10 270 23.102459 11 270 6.674804611 297.47791 18.124586 12 270 13.353545 12 332.52209 18.124586 13 3159.4610963 Dimple # 5 Dimple # 6 Type spherical Type spherical Radius0.0800 Radius 0.0825 SCD 0.0080 SCD 0.0080 TCD — TCD — # Phi Theta # PhiTheta  1 23.959474 52.85795 1 19.446897 42.09101  2 33.420036 28.8045032 70.553103 42.09101  3 36.311426 39.777883 3 109.4469 42.09101  437.838691 50.813627 4 160.5531 42.09101  5 52.161309 50.813627 5199.4469 42.09101  6 53.688574 39.777883 6 250.5531 42.09101  756.579964 28.804503 7 289.4469 42.09101  8 66.040526 52.85795 8 340.553142.09101  9 113.95947 52.85795 9 0 40.242952 10 123.42004 28.804503 1090 40.242952 11 126.31143 39.777883 11 180 40.242952 12 127.8386950.813627 12 270 40.242952 13 142.16131 50.813627 13 8.3680473 51.18010214 143.68857 39.777883 14 81.631953 51.180102 15 146.57996 28.804503 1598.368047 51.180102 16 156.04053 52.85795 16 171.63195 51.180102 17203.95947 52.85795 17 188.36805 51.180102 18 213.42004 28.804503 18261.63195 51.180102 19 216.31143 39.777883 19 278.36805 51.180102 20217.83869 50.813627 20 351.63195 51.180102 21 232.16131 50.813627 22233.68857 39.777883 23 236.57996 28.804503 24 246.04053 52.85795 25293.95947 52.85795 26 303.42004 28.804503 27 306.31143 39.777883 28307.83869 50.813627 29 322.16131 50.813627 30 323.68857 39.777883 31326.57996 28.804503 32 336.04053 52.85795 Dimple # 4 Type truncatedRadius 0.0670 SCD 0.0121 TCD 0.0039 # Phi Theta 1 0 62.0690668 2 0 83.53 5.65 73.3833254 4 11.26 83.5 5 13.34 62.0690668 6 16.83 73.3833254 722.66 83.5 8 26.32 62.8658456 9 27.98 73.3833254 10 33.82 83.5 11 38.4461.760315 12 39.02 73.3833254 13 45 83.5 14 50.98 73.3833254 15 51.5661.760315 16 56.18 83.5 17 62.02 73.3833254 18 63.68 62.8658456 19 67.3483.5 20 73.17 73.3833254 21 76.66 62.0690668 22 78.74 83.5 23 84.3573.3833254 24 90 62.0690668 25 90 83.5 26 95.65 73.3833254 27 101.2683.5 28 103.34 62.0690668 29 106.83 73.3833254 30 112.66 83.5 31 116.3262.8658456 32 117.98 73.3833254 33 123.82 83.5 34 128.44 61.760315 35129.02 73.3833254 36 135 83.5 37 140.98 73.3833254 38 141.56 61.76031539 146.18 83.5 40 152.02 73.3833254 41 153.68 62.8658456 42 157.34 83.543 163.17 73.3833254 44 166.66 62.0690668 45 168.74 83.5 46 174.3573.3833254 47 180 62.0690668 48 180 83.5 49 185.65 73.3833254 50 191.2683.5 51 193.34 62.0690668 52 196.83 73.3833254 53 202.66 83.5 54 206.3262.86585 55 207.98 73.38333 56 213.82 83.5 57 218.44 61.76032 58 219.0273.38333 59 225 83.5 60 230.98 73.38333 61 231.56 61.76032 62 236.1883.5 63 242.02 73.38333 64 243.68 62.86585 65 247.34 83.5 66 253.1773.38333 67 256.66 62.06907 68 258.74 83.5 69 264.35 73.38333 70 27062.06907 71 270 83.5 72 275.65 73.38333 73 281.26 83.5 74 283.3462.06907 75 286.83 73.38333 76 292.66 83.5 77 296.32 62.86585 78 297.9873.38333 79 303.82 83.5 80 308.44 61.76032 81 309.02 73.38333 82 31583.5 83 320.98 73.38333 84 321.56 61.76032 85 326.18 83.5 86 332.0273.38333 87 333.68 62.86585 88 337.34 83.5 89 343.17 73.38333 90 346.6662.06907 91 348.74 83.5 92 354.35 73.38333

In one example, the seam widths for balls 28-1, 28-2, and 28-3 was0.0088″ total (split on each hemisphere), while the seam widths forballs 25-2, 25-3, and 25-4 was 0.006″, and the seam width for ball 25-1was 0.030″.

Each of the dimple patterns described above and illustrated in FIGS. 1to 7 has less dimple volume in a band around the equator and more dimplevolume in the polar region. The balls with these dimple patterns have apreferred spin axis extending through the poles, so that slicing andhooking is resisted if the ball is placed on the tee with the preferredspin axis substantially horizontal. If placed on the tee with thepreferred spin axis pointing up and down (POP orientation), the ball ismuch less effective in correcting hooks and slices compared to beingoriented in the PH orientation. If desired, the ball may also beoriented on the tee with the preferred spin axis tilted up by about 45degrees to the right, and in this case the ball still reduces slicedispersion, but does not reduce hook dispersion as much. If thepreferred spin axis is tilted up by about 45 degrees to the left, theball reduces hook dispersion but does not resist slice dispersion asmuch.

FIG. 8 illustrates a ball 70 with a dimple pattern similar to the ball28-1 of FIG. 1 but which has a wider region or land region 72 with nodimples about the equator. In the embodiment of FIG. 8, the region 72 isformed by removing two rows of dimples on each side of the equator fromthe ball 10 of FIG. 1, leaving one row of shallow truncated dimples 74.The polar region of dimples is identical to that of FIG. 1, and likereference numbers are used for like dimples. Rows of truncated dimplesmay be removed from any of the balls of FIGS. 2 to 7 in a similar mannerto leave a dimpleless region or land area about the equator. Thedimpleless region in some embodiments may be narrow, like a wider seam,or may be wider by removing one, two, or all of the rows of truncateddimples next to the equator, producing a larger MOI difference betweenthe poles horizontal (PH) and other orientations.

FIG. 9 is a diagram illustrating the relationship between the chorddepth of a truncated and a spherical dimple as used in the dimplepatterns of the golf balls described above. A golf ball having adiameter of about 1.68 inches was molded using a mold with an insidediameter of approximately 1.694 inches to accommodate for the polymershrinkage. FIG. 9 illustrates part of the surface 75 of the golf ballwith a spherical dimple 76 of spherical chord depth of d₂ and a radius Rrepresented by half the length of the dotted line. In order to form atruncated dimple, a cut is made along plane A-A to make the dimpleshallower, with the truncated dimple having a truncated chord depth ofd₁, which is smaller than the spherical chord depth d₂. The volume ofcover material removed above the edges of the dimple is represented byvolume V3 above the dotted line, with a depth d₃. In FIG. 9,

-   V1=volume of truncated dimple,-   V1+V2=volume of spherical dimple,-   V1+V2+V3=volume of cover removed to create spherical dimple, and-   V1+V3=volume of cover removed to create truncated dimple.

For dimples that are based on the same radius and spherical chord depth,the moment of inertia difference between a ball with truncated dimplesand spherical dimples is related to the volume V2 below line or planeA-A which is removed in forming a spherical dimple and not removed forthe truncated dimple. A ball with all other factors being the sameexcept that one has only truncated dimples and the other has onlyspherical dimples, with the difference between the truncated andspherical dimples being only the volume V2 (i.e. all other dimpleparameters are the same), the ball with truncated dimples is of greaterweight and has a higher MOI than the ball with spherical dimples, whichhas more material removed from the surface to create the dimples.

The approximate moment of inertia can be calculated for each of theballs illustrated in FIGS. 1 to 7 and in Tables 1 to 8 (i.e. balls 2-9,25-1 to 25-4, and 28-1 to 28-3). In one embodiment, balls having thesepatterns were drawn in SolidWorks® and their MOI's were calculated alongwith the known Polara™ golf ball referenced above as a standard.SolidWorks® was used to calculate the MOI's based on each ball having auniform solid density of 0.036413 lbs/in̂3. The other physical size andweight parameters for each ball are given in Table 9 below.

TABLE 9 surface density, mass, volume, area, Ball lbs/in{circumflex over( )}3 mass, lbs grams inch{circumflex over ( )}3 inch{circumflex over( )}2 Polara 0.03613 0.09092 41.28 2.517 13.636  2-9 0.03613 0.0906441.15 2.509 13.596 25-1 0.03613 0.09060 41.13 2.508 13.611 25-2 0.036130.09024243 40.97 2.4979025 13.560402 25-3 0.03613 0.09028772 40.992.4991561 13.575728 25-4 0.03613 0.09026686 40.98 2.4985787 13.56885228-1 0.03613 0.09047 41.07 2.504 13.609 28-2 0.03613 0.09047 41.07 2.50413.609 28-3 0.03613 0.09053814 41.1 2.5060878 13.556403The MOI for each ball was calculated based on the dimple patterninformation and the physical information in Table 9. Table 10 shows theMOI calculations.

TABLE 10 % MOI delta Px, lbs × Py, lbs × Pz, lbs × MOI Delta = % (Pmax −relative to Ball inch{circumflex over ( )}2 inch{circumflex over ( )}2inch{circumflex over ( )}2 Pmax Pmin Pmax − Pmin Pmin)/Pmax PolaraPolara 0.025848 0.025917 0.025919 0.025919 0.025848 0.0000703 0.271%0.0%  2-9 0.025740 0.025741 0.025806 0.025806 0.025740 0.0000665 0.258%−5.0% 25-1 0.025712 0.025713 0.025800 0.025800 0.025712 0.0000880 0.341%25.7% 25-2 0.02556791 0.02557031 0.02558386 0.0255839 0.02556791.595E−05 0.062% −77.0% 25-3 0.0255822 0.02558822 0.02559062 0.02559060.0255822  8.42E−06 0.033% −87.9% 25-4 0.02557818 0.02558058 0.025597210.0255972 0.0255782 1.903E−05 0.074% −72.6% 28-1 0.025638 0.0256400.025764 0.025764 0.025638 0.0001254 0.487% 79.5% 28-2 0.025638 0.0256400.025764 0.025764 0.025638 0.0001258 0.488% 80.0% 28-3 0.025684610.02568647 0.02577059 0.0257706 0.0256846 8.598E−05 0.334% 23.0%

With the Polara™ golf ball as a standard, the MOI differences betweeneach orientation were compared to the Polara golf ball in addition tobeing compared to each other. The largest difference between any twoorientations is called the “MOI Delta”, shown in table 10. The twocolumns to the right quantify the MOI Delta in terms of the maximum %difference in MOI between two orientations and the MOI Delta relative tothe MOI Delta for the Polara ball. Because the density value used tocalculate the mass and MOI was lower than the average density of a golfball, the predicted weight and MOI for each ball is relative to eachother, but not exactly the same as the actual MOI values of the golfballs that were made, robot tested and shown in Table 10. Generally agolf ball weighs about 45.5-45.9 g. Comparing the MOI values of all ofthe balls in Table 10 is quite instructive, in that it predicts therelative order of MOI difference between the different designs, with the25-3 ball having the smallest MOI difference and ball 28-2 having thelargest MOI difference.

Table 11 shows that a ball's MOI Delta does strongly influence theball's dispersion control. In general as the relative MOI Delta of eachball increases, the dispersion distance for a slice shot decreases. Theresults illustrated in Table 11 also include data obtained from testinga known TopFlite XL straight ball, and were obtained during robottesting under standard laboratory conditions, as discussed in moredetail below.

TABLE 11 % MOI difference between Avg C-DISP, Avg C-DIST, Avg T-DISP,Avg T-DIST, Ball Orientation orientations ft yds ft yds 28-2 PH 0.488%9.6 180.6 7.3 201.0 28-1 PH 0.487% −2.6 174.8 −7.6 200.5 TopFLite XLrandom 0.000% 66.5 189.3 80.6 200.4 Straight 25-1 PH 0.341% 7.4 184.79.6 207.5 28-3 PH 0.334% 16.3 191.8 23.5 211.8 Polara PFB 0.271% 29.7196.6 38.0 214.6  2-9 PH 0.258% 12.8 192.2 10.5 214.5 25-4 PH 0.074%56.0 185.4 71.0 197.3 25-2 PH 0.062% 52.8 187.0 68.1 199.9 25-3 PH0.033% 63.4 188.0 75.1 197.9

As illustrated in Table 11, balls 28-3, 25-1, 28-1 and 28-2 all havehigher MOI deltas relative to the Polara, and they all have betterdispersion control than the Polara. This MOI difference is also shown inFIGS. 10 and 11, which also includes test data for the TopFlite XLStraight made by Callaway Golf.

The aerodynamic force acting on a golf ball during flight can be brokendown into three separate force vectors: Lift, Drag, and Gravity. Thelift force vector acts in the direction determined by the cross productof the spin vector and the velocity vector. The drag force vector actsin the direction opposite of the velocity vector. More specifically, theaerodynamic properties of a golf ball are characterized by its lift anddrag coefficients as a function of the Reynolds Number (Re) and theDimensionless Spin Parameter (DSP). The Reynolds Number is adimensionless quantity that quantifies the ratio of the inertial toviscous forces acting on the golf ball as it flies through the air. TheDimensionless Spin Parameter is the ratio of the golf ball's rotationalsurface speed to its speed through the air.

The lift and drag coefficients of a golf ball can be measured usingseveral different methods including an Indoor Test Range such as the oneat the USGA Test Center in Far Hills, N.J. or an outdoor system such asthe Trackman Net System made by Interactive Sports Group in Denmark. Thetest results described below and illustrated in FIGS. 10 to 17 for someof the embodiments described above as well as some conventional golfballs for comparison purposes were obtained using a Trackman Net System.

For right-handed golfers, particularly higher handicap golfers, a majorproblem is the tendency to “slice” the ball. The unintended slice shotpenalizes the golfer in two ways: 1) it causes the ball to deviate tothe right of the intended flight path and 2) it can reduce the overallshot distance. A sliced golf ball moves to the right because the ball'sspin axis is tilted to the right. The lift force by definition isorthogonal to the spin axis and thus for a sliced golf ball the liftforce is pointed to the right.

The spin-axis of a golf ball is the axis about which the ball spins andis usually orthogonal to the direction that the golf ball takes inflight. If a golf ball's spin axis is 0 degrees, i.e., a horizontal spinaxis causing pure backspin, the ball does not hook or slice and a higherlift force combined with a 0-degree spin axis only makes the ball flyhigher. However, when a ball is hit in such a way as to impart a spinaxis that is more than 0 degrees, it hooks, and it slices with a spinaxis that is less than 0 degrees. It is the tilt of the spin axis thatdirects the lift force in the left or right direction, causing the ballto hook or slice. The distance the ball unintentionally flies to theright or left is called Carry Dispersion. A lower flying golf ball,i.e., having a lower lift, is a strong indicator of a ball that haslower Carry Dispersion.

The amount of lift force directed in the hook or slice direction isequal to: Lift Force*Sine (spin axis angle). The amount of lift forcedirected towards achieving height is: Lift Force*Cosine (spin axisangle).

A common cause of a sliced shot is the striking of the ball with an openclubface. In this case, the opening of the clubface also increases theeffective loft of the club and thus increases the total spin of theball. With all other factors held constant, a higher ball spin rate ingeneral produces a higher lift force and this is why a slice shot oftenhas a higher trajectory than a straight or hook shot.

The table below shows the total ball spin rates generated by a golferwith club head speeds ranging from approximately 85-105 mph using a 10.5degree driver and hitting a variety of prototype golf balls andcommercially available golf balls that are considered to be low andnormal spin golf balls:

Spin Axis, degree Typical Total Spin, rpm Type Shot −30 2,500-5,000Strong Slice −15 1,700-5,000 Slice 0 1,400-2,800 Straight +151,200-2,500 Hook +30 1,000-1,800 Strong Hook

FIG. 10 illustrates the average Carry and Total Dispersion versus theMOI difference between the minimum and maximum orientations for eachdimple design (random for the TopFlite XL, which is a conforming orsymmetrical ball under USGA regulations), using data obtained from robottesting using a Trackman System as referenced above. Balls 25-2, 25-3,and 25-4 of FIG. 10 (also illustrated in FIGS. 4 to 6) are related sincethey have basically the same dimple pattern except that each has adifferent number of rows of dimples surrounding the equator, with ball25-2 having two rows on each side, ball 25-3 having four rows, and ball25-4 having three rows. The % MOI delta between the minimum and maximumorientation for each of these balls obtained from the data in FIG. 10 isindicated in Table 12 below.

TABLE 12 Rows of truncated around the equator % MOI Design # (perhemisphere) Delta 25-2 2 0.062% 25-3 4 0.033% 25-4 3 0.074%

FIG. 11 shows the average Carry and Total Distance versus the MOIdifference between the Minimum and Maximum orientations for each dimpledesign.

Table 13 below illustrates results from slice testing the 25-1, 28-1,and 2-9 balls as well as the Titleist ProV1 and the TopFlite XL Straightballs, with the 25-1, 28-1 and 2-9 balls tested in both the PH and POPorientations. In this table, the average values for carry dispersion,carry distance, total dispersion, total yards, and roll yards areindicated. This indicates that the 25-1, 28-1 and 2-9 balls havesignificantly less dispersion in the PH orientation than in the POPorientation, and also have less dispersion than the known symmetricalProV1 and TopFlite balls which were tested.

TABLE 13 Results from 4-15-10 slice test Average Values for TrackManData Carry Carry Total Total Ball Dispersion, Distance, Dispersion,Distance, Name Orientation ft yds ft yds Roll, yds 25-1 PH 11 197 17 22425 28-1 PH −8 194 −5 212 18  2-9 PH 15 202 22 233 30 25-1 POP 39 198 54215 18 28-1 POP 47 202 62 216 14  2-9 POP 65 194 79 206 13 ProV1 POP 66197 74 204 7 TopFlite POP 50 196 69 206 10

Golf balls 25-1, 28-1, 2-9, Polara 2p 4/08, Titleist ProV1 and TopFliteXL Straight were subjected to several tests under industry standardlaboratory conditions to demonstrate the better performance that thedimple patterns described herein obtain over competing golf balls. Inthese tests, the flight characteristics and distance performance of thegolf balls 25-1, 28-1 and 2-9 were conducted and compared with aTitleist Pro V1® made by Acushnet and TopFlite XL Straight made byCallaway Golf and a Polara 2p 4/08 made by Pounce Sports LLC. Also, eachof the golf balls 25-1, 28-1, 2-9, Polara 2p 4/08, were tested in thePoles-Forward-Backward (PFB), Pole-Over-Pole (POP) and Pole Horizontal(PH) orientations. The Pro V1® and TopFlite XL Straight are USGAconforming balls and thus are known to be spherically symmetrical, andwere therefore tested in no particular orientation (random orientation).Golf balls 25-1 and 28-1 were made from basically the same materials andhad a DuPont HPF 2000 based core and a Surlyn™ blend (50% 9150, 50%8150) cover. The cover was approximately 0.06 inches thick.

The tests were conducted with a “Golf Laboratories” robot and hit withthe same Taylor Made® driver at varying club head speeds. The TaylorMade® driver had a 10.5° R9 460 club head with a Motore 65 “S” shaft.The golf balls were hit in a random order. Further, the balls weretested under conditions to simulate an approximately 15-25 degree slice,e.g., a negative spin axis of 15-25 degrees.

FIGS. 12 and 13 are examples of the top and side view of thetrajectories for individual shots from the Trackman Net system whentested as described above. The Trackman trajectory data in FIGS. 12 and13 clearly shows the 28-1, 25-1 and 2-9 balls in PH orientation weremuch straighter (less dispersion) and lower flying (lower trajectoryheight). The maximum trajectory height data in FIG. 13 correlatesdirectly with the lift coefficient (CL) produced by each golf ball. Theresults indicate that the Pro V1® and TopFlite XL straight golf ballgenerated more lift than the 28-1, 25-1 or 2-9 balls in the PHorientation.

Lift and Drag Coefficient Testing & Results, CL and CD Regressions

FIGS. 14-17 show the lift and drag coefficients (CL and CD) versusReynolds Number (Re) at spin rates of 3,500 rpm and 4,500 rpmrespectively, for the 25-1, 28-1 and 2-9 dimple designs as well as forthe TopFlite® XL Straight, Polara 2p and Titleist Pro V1®. The curves ineach graph were generated from the regression analysis of multiplestraight shots for each ball design in a specific orientation.

The curves in FIGS. 14-17 depict the results of regression analysis ofmany shots over the course of testing done in the period from Januarythrough April 2010 under a variety of spin and Reynolds Numberconditions. To obtain the regression data shown in FIGS. 14 to 17, aTrackman Net System consisting of 3 radar units was used to track thetrajectory of a golf ball that was struck by a Golf Labs robot equippedwith various golf clubs. The robot was set up to hit a straight shotwith various combinations of initial spin and velocity. A wind gauge wasused to measure the wind speed at approximately 20 ft elevation near therobot location. The Trackman Net System measured trajectory data (x, y,z location vs. time) which were then used to calculate the liftcoefficients (CL) and drag coefficients (CD) as a function of measuredtime-dependent quantities including Reynolds Number, Ball Spin Rate, andDimensionless Spin Parameter. Each golf ball model or design was testedunder a range of velocity and spin conditions that included 3,000-5,000rpm spin rate and 120,000-180,000 Reynolds Number. A 5-termmultivariable regression model for the lift and drag coefficients as afunction of Reynolds Number (Re) and Dimensionless Spin Parameter (W)was then fit to the data for each ball design: The regression equationsfor CL and CD were:

CL _(Regression) =a ₁ *Re+a ₂ *W+a ₃ *Rê2+a ₄ *Ŵ2+a ₅ *ReW+a ₆

CD _(Regression) =b ₁ *Re+b ₂ *W+b ₃ *Rê2+b ₄ *Ŵ2+b ₅ *ReW+b ₆

Where a_(i) with i=1-6 are regression coefficients for Lift Coefficientand

b_(i) with i=1-6 are regression coefficients for Drag Coefficient

Typically the predicted CD and CL values within the measured Re and Wspace (interpolation) were in close agreement with the measured CD andCL values. Correlation coefficients of 96-99% were typical.

Below in Tables 14A and 14B are the regression constants for each ballshown in FIGS. 14-17. Using these regression constants, the Drag andLift coefficients can be calculated over the range of 3,000-5,000 rpmspin rate and 120,000-180,000 Reynolds Number. FIGS. 14 to 17 wereconstructed for a very limited set of spin and Re conditions (3,500 or4,500 rpm and varying the Re from 120,000 to 180,000), just to provide afew examples of the vast amount of data contained by the regressionconstants for lift and drag shown in Tables 14A and 14B. The constantscan be used to represent the lift and drag coefficients at any pointwithin the space of 3,000-5,000 rpm spin rate and 120,000-180,000Reynolds Number.

TABLE 14A Lift Coefficient regression equation coeficient Ball Design#Orientation a4 a3 a5 a2 a1 a6 25-1 PH −0.030201 −3.98E−12 −8.44E−070.867344 1.37E−06 −0.087395 25-1 PFB −2.20008 −3.94E−12 −4.28E−062.186681 1.61E−06 −0.129568 28-1 PFB −1.23292 −6.02E−12 −3.02E−061.722214 2.26E−06 −0.177147 28-1 PH −0.88888 −4.65E−12 −3.49E−061.496342 2.15E−06 −0.22382 Polara 2p 4/08 PH −0.572601 −2.02E−11−6.63E−06 1.303124  6.1E−06 −0.231079 Polara 2p 4/08 PFB −1.396513−7.39E−12 −2.82E−06 1.612026 2.34E−06 −0.140899 Titleist ProV1 na−0.996621 −4.01E−12 −1.83E−06 1.251743 1.08E−06 0.018157 2-9-121909 PFB−0.564838 −2.73E−12 8.44E−07 0.592334 1.78E−07 0.161622 2-9-121909 PH−3.198559 −8.57E−12 −8.56E−06 2.945159 3.57E−06 −0.349143 TopFliteXL-Str NA −0.551398 1.48E−12 1.76E−06 0.61879 −1.08E−06  0.222013

TABLE 14B Drag Coefficient regression equation coeficient Ball Design#Orientation b4 b3 b5 b2 b1 b6 25-1 PH 0.369982 −3.16E−12 −1.81E−07 0.278718 9.28E−07 0.139166 25-1 PFB −0.149176 −1.64E−12 3.04E−07 0.667055.35E−07 0.126985 28-1 PFB 0.431796 −1.62E−12 8.56E−07 0.25899 2.76E−070.200928 28-1 PH 0.84062 −2.23E−12 8.84E−07 −0.135614 4.23E−07 0.226051Polara 2p 4/08 PH −1.086276 4.01E−12 −2.33E−06  1.194892 −2.7E−070.157838 Polara 2p 4/08 PFB −0.620696 −3.52E−12 −1.3E−06 0.965054 1.2E−06 0.043268 Titleist ProV1 na −0.632946 2.37E−12 7.04E−07 0.761151−7.41E−07  0.195108 2-9-121909 PFB −0.822987 1.57E−13 2.61E−06 0.509−4.46E−07  0.224937 2-9-121909 PH 2.145845 −3.66E−12 −8.88E−07 −0.110029 1.14E−06 0.130302 TopFlite XL-Str NA −0.373608 −1.38E−121.85E−07 0.663666  3.5E−07 0.14574

As can be determined from FIGS. 14 to 17, the lift coefficient for balls25-1, 28-1 and 2-9 in a pole horizontal (PH) orientation is between 0.10and 0.14 at a Reynolds number (Re) of 180,000 and a spin rate of 3,500rpm, and between 0.14 and 0.20 at a Re of 120,000 and spin rate of3,500, which is less than the CL of the other three tested balls (Polara2p 0408 PH and PFB, Titleist ProV1 and TopFlite XL random orientation).The lift coefficient or CL of the 28-1, 25-1 and 2-9 balls in a PHorientation at a spin rate of 4,500 rpm is between 0.13 and 0.16 at anRe of 180,000 and between 0.17 and 0.25 at an Re of 120,000, as seen inFIG. 15. Drag Coefficients (CD) for the 28-1, 2-9 and 25-1 balls in PHorientation at a spin rate of 3,500 rpm are between 0.23 and 0.26 at anRe of 150,000 and between about 0.24 and 0.27 at an Re of 120,000 asillustrated in FIG. 16. CDs for the same balls at a spin rate of 4,500rpm (FIG. 17) are about 0.28 to 0.29 at an Re of 120,000 and about 0.23to 0.26 at an Re of 180,000.

Under typical slice conditions, with spin rates of 3,000 rpm or greater,the 2-9, 25-1, 28-1 in PH orientation and the Polara 2p in PFBorientation exhibit lower lift coefficients than the commercial balls:ProV1 and TopFlite XL Straight. Lower lift coefficients translate intolower trajectory for straight shots and less dispersion for slice shots.Balls with dimple patterns 2-9, 25-1, 28-1 in PH orientation haveapproximately 10-40% lower lift coefficients than the ProV1 and TopFliteXL Straight under Re and spin conditions characteristics of slice shots.

Tables 15-17 are the Trackman Report from the Robot Test. The robot wasset up to hit a slice shot with a club path of approximately 7 degreesoutside-in and a slightly opened club face. The club speed wasapproximately 98-100 mph, initial ball spin ranged from about3,800-5,200 rpm depending on ball construction and the spin axis wasapproximately 13-21 degrees.

TABLE 15 Vert. Horiz. Club Attack Club Swing Swing Dyn. Face Shot BallID w Speed Angle Path Plane Plane Loft Angle No Orientation ball Designorient [mph] [deg] [deg] [deg] [deg] [deg] [deg] 153 903PH  2-9 H 95.8−6.1 −6.8 55.7 −11.0 10.5 −4.6 156 902PH  2-9 H 95.1 −6.6 −6.9 55.9−11.4 10.7 −3.3 158 908PH  2-9 H 99.1 −6.1 −7.0 56.7 −11.0 10.5 −3.7 173908H  2-9 H 101.9 −6.5 −7.3 56.7 −11.6 10.2 −4.2 175 907H  2-9 H 99.7−5.5 −7.6 56.4 −11.2 10.4 −3.5 179 902H  2-9 H 96.7 −5.6 −6.5 56.9 −10.210.3 −4.4 185 907H  2-9 H 98.7 191 908H  2-9 H 98.2 −5.9 −7.7 54.9 −11.89.8 −3.7 155 904POP  2-9 POP 96.8 −5.7 −7.6 55.6 −11.5 10.2 −4.0 157906POP  2-9 POP 99.2 −6.0 −7.7 55.4 −11.8 10.6 −4.6 159 905POP  2-9 POP98.9 −5.6 −7.7 55.5 −11.5 10.3 −5.0 177 902POP  2-9 POP 98.8 −5.2 −6.857.3 −10.1 10.1 −3.9 178 906POP  2-9 POP 99.4 −6.0 −7.6 55.0 −11.8 10.3−3.7 187 901POP  2-9 POP 98.5 −5.9 −7.8 55.3 −11.8 10.2 −2.7 188 906POP 2-9 POP 101.1 −6.4 −7.4 54.0 −12.1 10.2 −4.5 196 904POP  2-9 POP 142505PH 25-1 H 100.1 −6.6 −7.7 54.4 −12.5 10.9 −4.0 143 502PH 25-1 H 145506PH 25-1 H 100.3 −5.6 −8.0 55.8 −11.8 10.7 −3.4 149 501PH 25-1 H 98.9−5.7 −7.5 56.2 −11.3 10.3 −4.9 160 502H 25-1 H 100.0 −6.0 −7.7 55.2−11.8 10.7 −4.1 163 506H 25-1 H 165 501H 25-1 H 99.0 −5.7 −7.8 55.9−11.7 10.1 −4.7 170 505H 25-1 H 100.7 −5.3 −7.9 55.7 −11.5 10.2 −4.3 184506H 25-1 H 98.8 −5.6 −7.7 55.6 −11.5 10.3 −3.3 186 502H 25-1 H 99.1−5.7 −7.9 54.7 −11.9 10.4 −4.1 193 502H 25-1 H 98.7 −5.8 −7.5 55.0 −11.610.0 −4.3 197 501PH 25-1 H 224 516H 25-1 H 99.0 −5.7 −7.6 55.4 −11.510.5 −4.4 192 503PFB 25-1 PFB 99.6 −5.7 −7.9 54.6 −11.9 10.3 −4.6 141503POP 25-1 POP 98.9 −5.8 −7.7 56.2 −11.6 11.0 −3.1 144 505POP 25-1 POP98.8 −5.7 −7.8 55.8 −11.7 11.1 −3.3 150 508POP 25-1 POP 98.8 −5.6 −7.956.3 −11.6 10.3 −3.1 151 507POP 25-1 POP 98.9 −5.7 −7.8 55.9 −11.7 11.2−3.3 161 508POP 25-1 POP 99.5 −5.5 −7.9 54.8 −11.8 10.1 −4.3 162 507POP25-1 POP 99.1 −5.5 −7.6 55.4 −11.4 10.7 −4.2 166 504POP 25-1 POP 99.0−5.6 −7.8 55.9 −11.6 10.9 −3.5 171 503POP 25-1 POP 99.0 −5.7 −7.8 56.3−11.6 10.9 −4.1 182 504P 25-1 POP 98.9 −5.8 −7.8 55.3 −11.8 10.5 −3.4183 507POP 25-1 POP 98.9 −5.7 −7.8 55.8 −11.7 10.2 −3.5 189 508POP 25-1POP 99.1 −5.7 −7.5 54.7 −11.6 10.7 −3.3 169 802F 28-1 F 98.3 −5.1 −8.256.4 −11.6 10.6 −3.4 231 814F 28-1 F 98.9 −5.7 −7.8 56.0 −11.7 10.9 −3.5146 803PH 28-1 H 99.2 −5.8 −7.9 56.0 −11.8 10.7 −3.2 167 803H 28-1 H99.0 −5.4 −7.6 56.0 −11.3 10.4 −3.8 195 803H 28-1 H 98.8 −5.6 −7.7 55.6−11.5 8.8 −4.0 199 812H 28-1 H 98.8 −6.2 −7.4 54.5 −11.8 9.4 −3.8 208815H 28-1 H 98.8 −5.9 −7.5 54.9 −11.7 10.5 −4.0 233 811H 28-1 H 99.3−6.1 −7.4 55.8 −11.6 11.1 −3.6 194 801PFB 28-1 PFB 98.7 −5.5 −7.9 55.0−11.7 10.4 −4.0 147 802POP 28-1 POP 148 801POP 28-1 POP 98.8 −5.7 −7.956.0 −11.8 10.9 −3.4 164 801POP 28-1 POP 97.6 −6.5 −7.1 55.0 −11.6 10.8−4.0 181 802POP 28-1 POP 98.5 −5.2 −8.0 56.2 −11.5 10.4 −2.7 205 V140Titleist ProV1 na 98.8 −5.7 −7.5 54.7 −11.6 10.2 −4.4 212 V92 TitleistProV1 na 98.8 −5.6 −7.7 54.7 −11.6 10.4 −4.5 219 V95 Titleist ProV1 na99.3 −5.8 −7.5 54.4 −11.7 10.4 −4.6 237 V76 Titleist ProV1 na 98.9 −6.1−8.1 54.9 −12.4 10.6 −3.5 241 V180 Titleist ProV1 na 97.6 −5.7 −7.0 56.5−10.8 11.0 −4.4 243 V97 Titleist ProV1 na 99.3 −5.6 −7.8 56.1 −11.5 10.5−4.2 198 224 TopFlite XL Straight na 99.3 −6.3 −7.0 53.4 −11.7 10.3 −4.7207 225 TopFlite XL Straight na 98.7 −6.1 −7.6 55.3 −11.8 10.4 −3.6 215223 TopFlite XL Straight na 96.5 −5.2 −7.6 56.5 −11.0 10.4 −4.2 222 227TopFlite XL Straight na 98.8 −6.2 −6.9 54.1 −11.4 10.2 −4.7 236 185TopFlite XL Straight na 98.8 −4.6 −8.7 56.1 −11.8 10.2 −3.3 248 222TopFlite XL Straight na 98.9 −7.0 −6.5 56.1 −11.2 10.8 −3.6

TABLE 16 Ball Smash Vert. Horiz. Drag Lift Spin Spin Max Max Max ShotSpeed factor Angle Angle Coef. Coef. Rate Axis Height x Height y Heightz No [mph] [ ] [deg] [deg] [ ] [ ] [rpm] [deg] [yds] [yds] [yds] 153142.8 1.49 7.6 5.0L 0.26 0.19 4212 21.0 129.9 17.6 0.5L 156 141.2 1.488.0 4.0L 0.24 0.16 4048 12.6 129.4 15.9 3.9L 158 141.8 1.43 7.8 4.3L0.23 0.15 4013 16.1 132.1 15.7 3.5L 173 143.3 1.41 7.4 4.6L 0.27 0.214105 19.7 132.6 20.3 2.6R 175 142.0 1.42 7.4 4.4L 0.26 0.18 4459 16.9132.3 18.1 0.1L 179 141.4 1.46 7.5 5.1L 0.24 0.16 4017 19.3 128.3 15.23.0L 185 141.3 1.43 7.7 3.9L 0.25 0.16 3922 16.4 126.7 15.1 2.2L 191142.5 1.45 7.3 4.3L 0.26 0.17 3899 18.4 131.4 17.1 0.8R 155 143.0 1.487.1 4.7L 0.29 0.22 4472 22.1 128.2 19.7 4.9R 157 143.0 1.44 7.9 5.1L0.28 0.20 3943 22.4 127.6 19.8 3.6R 159 142.4 1.44 7.5 5.5L 0.26 0.214063 23.0 130.0 19.7 3.9R 177 142.6 1.44 7.2 4.5L 0.29 0.22 4246 16.9132.5 22.2 3.5R 178 143.6 1.44 7.3 4.5L 0.30 0.22 4410 23.6 127.8 19.66.3R 187 142.0 1.44 7.5 3.6L 0.28 0.21 4142 14.9 136.7 21.9 2.2R 188142.8 1.41 7.4 5.0L 0.29 0.22 3974 21.2 132.5 22.7 6.4R 196 141.8 7.24.4L 0.28 0.23 4190 22.0 131.6 22.5 9.9R 142 144.7 1.45 7.5 4.9L 0.260.15 5019 16.0 124.4 14.7 4.1L 143 146.5 7.4 4.3L 0.26 0.16 4903 16.4127.4 15.7 1.8L 145 146.0 1.46 7.4 4.4L 0.25 0.16 5020 18.7 128.3 15.51.8L 149 146.6 1.48 7.2 5.5L 0.27 0.19 4929 16.9 137.1 20.8 0.7L 160145.5 1.46 7.7 4.9L 0.26 0.14 4644 13.5 122.2 14.3 5.5L 163 145.8 7.14.6L 0.25 0.15 4930 16.9 125.6 13.9 3.4L 165 147.0 1.49 7.1 5.4L 0.260.18 4717 17.6 139.0 19.7 2.1L 170 146.2 1.45 7.0 5.2L 0.26 0.16 496216.2 127.6 15.0 3.7L 184 145.7 1.47 7.0 4.5L 0.27 0.15 4926 15.9 122.414.0 2.9L 186 146.1 1.47 7.3 5.0L 0.26 0.14 4628 11.2 119.9 13.4 6.5L193 146.8 1.49 6.8 5.0L 0.29 0.18 4775 17.7 130.0 17.0 2.1L 197 145.67.1 4.9L 0.26 0.17 4612 16.0 135.3 18.4 0.5L 224 146.6 1.48 7.2 5.4L0.29 0.16 4816 16.5 125.4 15.7 4.7L 192 145.7 1.46 7.0 5.3L 0.29 0.204834 16.5 133.2 21.4 1.8R 141 146.9 1.48 7.5 4.1L 0.31 0.21 5169 18.0132.5 22.1 3.8R 144 145.9 1.48 7.8 4.2L 0.28 0.20 4897 17.6 133.5 21.54.0R 150 147.0 1.49 7.1 4.2L 0.30 0.21 4938 14.5 133.5 22.0 1.5R 151146.1 1.48 7.8 4.4L 0.28 0.19 5122 14.7 134.7 21.2 0.4L 161 146.0 1.476.9 5.1L 0.28 0.20 4813 21.3 133.7 19.3 2.4R 162 146.4 1.48 7.3 5.0L0.29 0.21 5020 17.2 134.5 21.4 1.0R 166 146.8 1.48 7.6 4.6L 0.30 0.204993 11.8 133.3 21.6 0.5L 171 147.1 1.48 7.6 4.9L 0.29 0.21 5069 18.9133.7 21.8 2.9R 182 146.3 1.48 7.3 4.3L 0.28 0.20 4779 19.5 135.3 21.36.8R 183 146.1 1.48 7.1 4.3L 0.30 0.21 4871 13.9 136.3 22.8 1.6R 189145.5 1.47 7.6 4.4L 0.29 0.19 4573 12.5 129.4 19.4 1.9L 169 145.8 1.486.9 4.7L 0.31 0.21 5582 20.8 129.5 20.2 5.6R 231 147.2 1.49 7.4 4.5L0.32 0.22 5353 15.2 130.3 23.5 1.8R 146 146.7 1.48 7.5 4.2L 0.27 0.154996 15.1 120.5 14.1 3.5L 167 146.1 1.48 7.3 4.8L 0.28 0.14 4786 16.7114.3 12.8 4.2L 195 145.6 1.47 7.4 4.5L 0.28 0.14 4612 17.0 109.2 11.83.7L 199 145.5 1.47 8.0 4.3L 0.29 0.14 4513 9.8 114.1 13.8 5.6L 208146.6 1.48 7.3 4.9L 0.29 0.15 4960 12.6 117.0 14.0 5.5L 233 146.5 1.487.6 4.5L 0.30 0.16 5181 16.7 119.7 15.1 3.1L 194 146.8 1.49 7.0 4.9L0.32 0.22 5172 14.7 129.9 23.1 1.4R 147 146.8 7.2 4.0L 0.30 0.19 504515.0 132.8 20.3 1.2R 148 146.8 1.49 7.6 4.3L 0.29 0.20 4915 19.8 133.921.2 5.5R 164 146.6 1.50 7.5 4.6L 0.28 0.18 4812 15.8 134.9 19.1 0.0R181 145.4 1.48 7.2 3.8L 0.28 0.19 4748 16.9 131.9 18.8 2.4R 205 144.91.47 7.3 5.0L 0.27 0.22 4388 16.6 143.1 26.0 5.2R 212 145.3 1.47 7.35.1L 0.28 0.22 4618 15.1 142.7 26.6 3.3R 219 145.1 1.46 7.3 5.2L 0.300.23 4534 14.1 139.0 26.4 0.3R 237 145.9 1.48 7.7 4.3L 0.29 0.23 440014.3 140.8 28.1 5.5R 241 144.7 1.48 7.9 5.0L 0.29 0.22 4546 18.4 141.327.0 8.5R 243 145.4 1.46 7.3 5.0L 0.30 0.24 4834 17.8 139.3 28.0 8.0R198 145.0 1.46 7.6 5.1L 0.28 0.22 3925 16.4 139.6 26.1 3.3R 207 145.41.47 7.6 4.3L 0.29 0.21 4254 14.6 138.9 24.7 4.4R 215 144.5 1.50 7.44.9L 0.30 0.23 4412 17.5 139.7 26.4 6.0R 222 145.3 1.47 7.3 5.2L 0.290.23 4362 13.3 140.0 27.3 1.0R 236 145.0 1.47 7.4 4.5L 0.29 0.23 452313.0 142.9 27.8 4.2R 248 145.3 1.47 7.9 4.1L 0.30 0.24 4424 12.0 138.731.0 4.5R

TABLE 17 Spin Vert. Ball Spin Flight Shot Length X Side Height Rate TimeLength X Side Angle Speed Rate Time No [yds] [yds] [yds] [yds] [rpm] [s][yds] [yds] [yds] [deg] [mph] [rpm] [s] 153 198.4 198.3 5.6R −0.2 5.13198.1 198.0 5.5R −31.3 59.7 5.12 156 203.3 203.3 1.1L −0.3 5.05 202.8202.8 1.2L −27.4 60.0 5.02 158 204.4 204.4 1.7L −0.2 3180 5.08 204.1204.1 1.7L −27.7 59.5 3182 5.07 173 197.6 197.3 10.7R −0.3 3292 5.35197.2 196.9 10.7R −36.1 59.2 3295 5.33 175 197.3 197.2 6.7R −0.2 5.30197.0 196.9 6.6R −33.2 56.9 5.28 179 201.6 201.6 0.7R −0.2 4.90 201.2201.2 0.7R −26.1 63.2 4.89 185 194.3 194.3 0.4R −0.1 4.88 194.1 194.10.4R −28.2 60.2 4.87 191 190.6 190.4 8.3R −0.1 3076 5.19 190.6 190.48.3R −35.3 54.4 3076 5.19 155 189.7 188.8 18.3R 0.2 3714 5.21 190.0189.1 18.3R −36.1 58.8 3713 5.23 157 191.1 190.2 17.6R −0.3 3164 5.18190.7 189.9 17.5R −35.3 60.2 3166 5.17 159 190.1 189.0 20.2R 0.0 32475.17 190.1 189.0 20.2R −36.6 60.5 3247 5.17 177 191.7 191.2 14.6R −0.53397 5.53 191.2 190.6 14.5R −41.0 58.3 3401 5.50 178 190.6 189.4 21.2R0.1 3598 5.21 190.8 189.6 21.3R −35.5 58.5 3597 5.21 187 198.5 198.210.8R −0.4 3262 5.72 198.1 197.8 10.7R −40.7 54.1 3264 5.70 188 187.2185.9 22.1R 0.0 3116 5.65 187.2 185.9 22.1R −43.9 53.8 3115 5.65 196186.2 184.0 28.2R 0.2 5.65 186.4 184.2 28.3R −43.3 54.3 5.66 142 192.7192.7 1.4L −0.2 4.80 192.3 192.3 1.4L −27.0 59.7 4.78 143 195.0 194.94.0R −0.3 4.91 194.4 194.4 3.9R −28.8 59.6 4.89 145 196.9 196.8 2.8R−0.2 4.93 196.4 196.4 2.7R −28.1 59.4 4.91 149 199.0 198.9 6.8R −0.33934 5.56 198.6 198.5 6.8R −37.7 56.4 3936 5.54 160 192.6 192.6 4.9L−0.2 3702 4.68 192.3 192.2 4.9L −25.6 61.8 3704 4.66 163 196.3 196.30.1L −0.2 4.74 195.9 195.9 0.2L −25.2 60.6 4.73 165 203.3 203.3 2.3R−0.5 3709 5.60 202.7 202.7 2.3R −36.1 53.7 3712 5.57 170 196.4 196.40.5R −0.2 3956 4.85 196.0 196.0 0.5R −27.3 60.5 3958 4.83 184 188.8188.8 0.3R −0.2 4.68 188.5 188.5 0.3R −26.7 58.5 4.67 186 189.2 189.17.2L −0.3 3703 4.50 188.6 188.4 7.3L −25.0 62.4 3707 4.48 193 192.8192.8 1.3R −0.2 5.19 192.5 192.5 1.2R −33.3 53.4 5.18 197 190.8 190.76.8R −0.2 3587 5.54 190.6 190.4 6.7R −39.4 49.9 3588 5.53 224 189.9189.8 4.2L −0.2 3777 5.00 189.5 189.5 4.2L −30.9 53.1 3779 4.98 192187.0 186.3 16.0R −0.5 3777 5.70 186.5 185.8 15.8R −43.2 50.7 3781 5.67141 195.0 194.3 16.7R −0.2 4093 5.63 194.8 194.1 16.6R −38.6 55.5 40955.62 144 196.4 195.5 19.0R 0.4 3950 5.58 197.0 196.1 19.1R −37.0 54.43948 5.60 150 198.0 197.6 12.6R −0.5 3920 5.58 197.4 197.0 12.5R −37.656.8 3925 5.55 151 201.0 200.8 8.1R −0.4 4011 5.65 200.4 200.3 8.0R−36.6 53.6 4016 5.62 161 196.3 195.8 14.7R −0.3 3854 5.38 195.9 195.314.6R −35.2 56.8 3856 5.36 162 200.6 200.3 10.4R −0.4 4008 5.52 200.0199.8 10.3R −36.3 58.0 4011 5.50 166 196.2 195.9 9.7R −0.3 3934 5.62195.8 195.6 9.6R −38.4 53.4 3936 5.60 171 200.0 199.4 16.0R −0.3 40065.54 199.7 199.0 16.0R −37.1 56.3 4009 5.53 182 192.9 191.3 25.5R 0.43714 5.69 193.4 191.6 25.7R −40.1 51.7 3710 5.72 183 193.3 192.9 12.9R−0.3 3829 5.79 193.0 192.6 12.8R −42.8 53.8 3831 5.77 189 189.4 189.34.9R −0.1 3545 5.41 189.3 189.2 4.9R −38.1 49.9 3546 5.40 169 188.3186.9 22.4R 0.4 4376 5.46 188.8 187.4 22.6R −37.7 52.7 4371 5.48 231183.7 183.3 12.7R −0.2 4123 5.91 183.5 183.1 12.7R −46.6 46.7 4124 5.90146 188.9 188.9 1.6L −0.2 3978 4.55 188.4 188.4 1.7L −26.2 61.5 39814.54 167 178.8 178.7 3.1L 0.2 3846 4.29 179.1 179.1 3.1L −25.3 61.2 38444.30 195 171.5 171.5 1.5L 0.1 4.10 171.7 171.7 1.5L −24.5 60.5 4.11 199176.1 175.9 8.1L 0.0 3524 4.49 176.0 175.8 8.1L −28.8 54.9 3524 4.49 208178.2 178.1 6.1L −0.1 3935 4.56 178.2 178.1 6.1L −29.6 55.2 3935 4.56233 180.1 180.1 1.0L 0.0 4.75 180.1 180.1 1.0L −31.9 53.0 4.75 194 185.0184.6 12.4R −0.3 4020 5.77 184.7 184.3 12.3R −44.2 49.7 4023 5.76 147197.9 197.5 11.8R −0.6 3957 5.57 197.1 196.7 11.6R −36.2 53.7 3964 5.53148 195.7 194.5 21.9R 0.2 3655 5.58 195.9 194.7 22.0R −38.6 53.2 36525.59 164 200.5 200.1 11.7R −0.4 3760 5.51 199.8 199.5 11.6R −34.9 53.13764 5.48 181 193.3 192.7 14.9R −0.4 3725 5.41 192.8 192.2 14.8R −36.152.8 3728 5.39 205 198.6 197.6 20.5R 1.6 6.30 200.1 199.0 20.8R −48.147.3 6.40 212 195.9 195.0 18.9R 1.3 3740 6.39 197.1 196.1 19.3R −47.947.8 3731 6.46 219 195.9 195.7 9.2R −0.3 3695 6.31 195.7 195.5 9.2R−46.9 48.9 3697 6.29 237 192.8 191.8 19.6R 5.4 3590 6.12 197.8 196.720.9R −48.5 49.9 3547 6.43 241 195.1 193.2 27.4R 0.2 3680 6.46 195.3193.4 27.4R −49.8 48.3 3679 6.47 243 184.6 183.1 23.4R 7.8 6.02 191.1189.4 25.4R −52.4 47.1 6.48 198 195.3 194.6 16.1R 0.0 3231 6.24 195.3194.6 16.1R −47.0 50.0 3231 6.24 207 197.7 196.5 21.1R 0.2 6.24 197.9196.8 21.1R −43.5 48.4 6.25 215 194.8 193.5 22.2R −0.6 3582 6.32 194.3193.1 22.0R −48.6 50.8 3585 6.29 222 195.7 195.3 12.5R −0.4 3564 6.41195.3 195.0 12.4R −48.4 49.3 3566 6.39 236 199.5 198.4 20.6R 0.5 36226.51 199.9 198.9 20.8R −48.0 48.4 3618 6.54 248 191.2 190.3 18.5R 0.13613 6.60 191.3 190.4 18.5R −51.4 50.9 3612 6.61

The non-conforming golf balls described above which have dimple patternsincluding areas of less dimple volume along at least part of a bandaround the equator and more dimple volume in the polar regions have alarge enough moment of inertia (MOI) difference between the poleshorizontal (PH) or maximum orientation and other orientations that theball has a preferred spin axis extending through the poles of the ball.As described above, this preferred spin axis helps to prevent or reducethe amount of hook or slice dispersion when the ball is hit in a waywhich would normally produce hooking or slicing in a conventional,symmetrically designed golf ball. This reduction in dispersion isillustrated for the embodiments described above in FIG. 10 and for someof the embodiments in FIG. 12. Although a preferred spin axis mayalternatively be established by placing high and low density materialsin specific locations within the core or intermediate layers of a golfball, such construction adds cost and complexity to the golf ballmanufacturing process. In contrast, balls having the different dimplepatterns described above can be readily manufactured by suitable designof the hemispherical mold cavities, for example as illustrated in FIG. 3for a 2-9 ball.

Although the illustrated embodiments all have reduced dimple volume in aband around the equator as compared to the dimple volume in the polarregions, other dimple patterns which generate preferred spin axis may beused in alternative embodiments to achieve similar results. For example,the low volume dimples do not have to be located in a continuous bandaround the ball's equator. The low volume dimples could be interspersedwith larger volume dimples about the equator, the band could be wider insome parts of the circumference than others, part of the band could bedimpleless around part or all of the circumference, or there may be nodimples at all around the equatorial region. Another embodiment maycomprise a dimple pattern having two or more regions of lower or zerodimple volume on the surface of the ball, with the regions beingsomewhat co-planar. This also creates a preferred spin axis. In oneexample, if the two areas of lower volume dimples are placed oppositeone another on the ball, then a dumbbell-like weight distribution iscreated. This results in a ball with a preferred spin axis equal to theorientation of the ball when rotating end-over-end with the “dumbbell”areas.

Although the dimples in the embodiments illustrated in FIGS. 1 to 8 anddescribed above are all circular dimples, it will be understood thatthere is a wide variety of types and construction of dimples, includingnon-circular dimples, such as those described in U.S. Pat. No.6,409,615, hexagonal dimples, dimples formed of a tubular latticestructure, such as those described in U.S. Pat. No. 6,290,615, as wellas more conventional dimple types. It will also be understood that anyof these types of dimples can be used in conjunction with theembodiments described herein. As such, the term “dimple” as used in thisdescription and the claims that follow is intended to refer to andinclude any type or shape of dimple or dimple construction, unlessotherwise specifically indicated.

The above description of the disclosed embodiments is provided to enableany person skilled in the art to make or use the invention. Variousmodifications to these embodiments will be readily apparent to thoseskilled in the art, and the generic principles described herein can beapplied to other embodiments without departing from the spirit or scopeof the invention. Thus, it is to be understood that the description anddrawings presented herein represent a presently preferred embodiment ofthe invention and are therefore representative of the subject matterwhich is broadly contemplated by the present invention. It is furtherunderstood that the scope of the present invention fully encompassesother embodiments that may become obvious to those skilled in the artand that the scope of the present invention is accordingly limited bynothing other than the appended claims.

1. A golf ball having an outer surface, an equator and two poles, and aplurality of dimples formed on the outer surface of the ball, the outersurface comprising one or more first areas which include a plurality offirst dimples which together have a first dimple volume and at least onesecond area having a dimple volume less that the first dimple volume,the first and second areas being configured to establish a preferredspin axis such that the golf ball exhibits a drag coefficient of lessthan about 0.27 at a Reynolds number of about 120,000 and of less thanabout 0.24 at a Reynolds number of about 180,000 when the ball isspinning around its preferred spin axis with a spin rate of about 3,500rpm or greater.
 2. The golf ball of claim 1, wherein the dragcoefficient when the golf ball is spinning around its preferred spinaxis is below about 0.26 at a Reynolds number of about 130,000 and aspin rate of about 3,500 rpm.
 3. The golf ball of claim 1, wherein thedrag coefficient when the golf ball is spinning around its preferredspin axis is below about 0.25 at a Reynolds number of about 140,000 anda spin rate of about 3,500 rpm.
 4. The golf ball of claim 1, wherein thedrag coefficient when the golf ball is spinning around its preferredspin axis is below about 0.25 at a Reynolds number of about 150,000 anda spin rate of about 3,500 rpm.
 5. The golf ball of claim 1, wherein thedrag coefficient when the golf ball is spinning around its preferredspin axis is below about 0.24 at a Reynolds number of about 160,000 anda spin rate of about 3,500 rpm.
 6. The golf ball of claim 1, wherein thedrag coefficient when the golf ball is spinning around its preferredspin axis is below about 0.24 at a Reynolds number of about 170,000 anda spin rate of about 3,500 rpm.
 7. The golf ball of claim 1, wherein thedrag coefficient when the golf ball is spinning around its preferredspin axis is above about 0.25 at a Reynolds number of about 120,000 anda spin rate of about 3,500 rpm.
 8. The golf ball of claim 1, wherein thedrag coefficient when the golf ball is spinning around its preferredspin axis is above about 0.24 at a Reynolds number of about 130,000 anda spin rate of about 3,500 rpm.
 9. The golf ball of claim 1, wherein thedrag coefficient when the golf ball is spinning around its preferredspin axis is above about 0.24 at a Reynolds number of about 140,000 anda spin rate of about 3,500 rpm.
 10. The golf ball of claim 1, whereinthe drag coefficient when the golf ball is spinning around its preferredspin axis is above about 0.23 at a Reynolds number of about 150,000 anda spin rate of about 3,500 rpm.
 11. The golf ball of claim 1, whereinthe drag coefficient when the golf ball is spinning around its preferredspin axis is above about 0.22 at a Reynolds number of about 160,000 anda spin rate of about 3,500 rpm.
 12. The golf ball of claim 1, whereinthe drag coefficient when the golf ball is spinning around its preferredspin axis is above about 0.22 at a Reynolds number of about 170,000 anda spin rate of about 3,500 rpm.
 13. The golf ball of claim 1, whereinthe drag coefficient when the golf ball is spinning around its preferredspin axis is above about 0.21 at a Reynolds number of about 180,000 anda spin rate of about 3,500 rpm.
 14. The golf ball of claim 1, whereinthe first and second areas define a non-conforming dimple pattern.
 15. Agolf ball having an outer surface, an equator and two poles, and aplurality of dimples formed on the outer surface of the ball, the outersurface comprising one or more first areas which include a plurality offirst dimples which together have a first dimple volume and at least onesecond area having a dimple volume less that the first dimple volume,the first and second areas being configured to establish a preferredspin axis such that the golf ball exhibits a drag coefficient of lessthan about 0.24 over a range of Reynolds number from about 120,000 toabout 180,000 when the ball is spinning around its preferred spin axiswith a spin rate of about 3,500 rpm or greater.
 16. The golf ball ofclaim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is below about 0.26 at a Reynolds numberof about 120,000 and a spin rate of about 3,500 rpm.
 17. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is below about 0.25 at a Reynolds numberof about 130,000 and a spin rate of about 3,500 rpm.
 18. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is below about 0.25 at a Reynolds numberof about 140,000 and a spin rate of about 3,500 rpm.
 19. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is below about 0.24 at a Reynolds numberof about 150,000 and a spin rate of about 3,500 rpm.
 20. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is below about 0.24 at a Reynolds numberof about 160,000 and a spin rate of about 3,500 rpm.
 21. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is below about 0.23 at a Reynolds numberof about 170,000 and a spin rate of about 3,500 rpm.
 22. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is below about 0.22 at a Reynolds numberof about 180,000 and a spin rate of about 3,500 rpm.
 23. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is above about 0.25 at a Reynolds numberof about 120,000 and a spin rate of about 3,500 rpm.
 24. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is above about 0.24 at a Reynolds numberof about 130,000 and a spin rate of about 3,500 rpm.
 25. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is above about 0.24 at a Reynolds numberof about 140,000 and a spin rate of about 3,500 rpm.
 26. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is above about 0.23 at a Reynolds numberof about 150,000 and a spin rate of about 3,500 rpm.
 27. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is above about 012 at a Reynolds numberof about 160,000 and a spin rate of about 3,500 rpm.
 28. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is above about 0.22 at a Reynolds numberof about 170,000 and a spin rate of about 3,500 rpm.
 29. The golf ballof claim 15, wherein the drag coefficient when the golf ball is spinningaround its preferred spin axis is above about 0.21 at a Reynolds numberof about 180,000 and a spin rate of about 3,500 rpm.
 30. The golf ballof claim 15, wherein the first and second areas define a non-conformingdimple pattern.